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RHSA-2026:36797

Vulnerability from csaf_redhat - Published: 2026-07-08 15:46 - Updated: 2026-09-14 23:46
Summary
Red Hat Security Advisory: RHTAS 1.4.2 - CLI Stack Release
Severity
Important
Notes
Topic: The 1.4.2 release of the RHTAS CLIs. For more details please visit the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.4
Details: The RHTAS CLI Stack images for RHTAS 1.4.2
Terms of Use: This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.
CVE-2026-27145

A flaw was found in the `crypto/x509` package of `golang`. This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by presenting a specially crafted X.509 certificate with a large number of DNS Subject Alternative Name (SAN) entries. The certificate verification process, specifically the `VerifyHostname` function, incurs excessive computational overhead due to repeated string operations when processing these entries. This can lead to a significant performance degradation or unresponsiveness of systems validating such certificates.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-606 - Unchecked Input for Loop Condition
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:conforma-cli-stack-v1-4@amd64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:conforma-cli-stack-v1-4@amd64_darwin —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:conforma-cli-stack-v1-4@amd64_windows —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:conforma-cli-stack-v1-4@arm64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:conforma-cli-stack-v1-4@arm64_darwin —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:conforma-cli-stack-v1-4@ppc64le —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:conforma-cli-stack-v1-4@s390x —
Vendor Fix fix
Workaround
Product Identifier Version Remediation
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:cosign-cli-stack-v1-4@amd64 —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:cosign-cli-stack-v1-4@amd64_darwin —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:cosign-cli-stack-v1-4@amd64_windows —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:cosign-cli-stack-v1-4@arm64 —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:cosign-cli-stack-v1-4@arm64_darwin —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:cosign-cli-stack-v1-4@ppc64le —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:cosign-cli-stack-v1-4@s390x —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:fetch-tsa-certs-cli-stack-v1-4@amd64 —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:fetch-tsa-certs-cli-stack-v1-4@amd64_darwin —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:fetch-tsa-certs-cli-stack-v1-4@amd64_windows —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:fetch-tsa-certs-cli-stack-v1-4@arm64 —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:fetch-tsa-certs-cli-stack-v1-4@arm64_darwin —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:fetch-tsa-certs-cli-stack-v1-4@ppc64le —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:fetch-tsa-certs-cli-stack-v1-4@s390x —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:gitsign-cli-stack-v1-4@amd64 —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:gitsign-cli-stack-v1-4@amd64_darwin —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:gitsign-cli-stack-v1-4@amd64_windows —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:gitsign-cli-stack-v1-4@arm64 —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:gitsign-cli-stack-v1-4@arm64_darwin —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:gitsign-cli-stack-v1-4@ppc64le —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:gitsign-cli-stack-v1-4@s390x —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:model-transparency-cli-stack-v1-4@amd64 —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:model-transparency-cli-stack-v1-4@amd64_darwin —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:model-transparency-cli-stack-v1-4@amd64_windows —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:model-transparency-cli-stack-v1-4@arm64 —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:model-transparency-cli-stack-v1-4@arm64_darwin —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:model-transparency-cli-stack-v1-4@ppc64le —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:model-transparency-cli-stack-v1-4@s390x —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:rekor-cli-stack-v1-4@amd64 —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:rekor-cli-stack-v1-4@amd64_darwin —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:rekor-cli-stack-v1-4@amd64_windows —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:rekor-cli-stack-v1-4@arm64 —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:rekor-cli-stack-v1-4@arm64_darwin —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:rekor-cli-stack-v1-4@ppc64le —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:rekor-cli-stack-v1-4@s390x —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:trillian-cli-stack-v1-4@amd64 —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:trillian-cli-stack-v1-4@amd64_darwin —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:trillian-cli-stack-v1-4@amd64_windows —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:trillian-cli-stack-v1-4@arm64 —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:trillian-cli-stack-v1-4@arm64_darwin —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:trillian-cli-stack-v1-4@ppc64le —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:trillian-cli-stack-v1-4@s390x —
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:tuftool-cli-stack-v1-4@amd64 —
Workaround
Threats
Impact Important
CVE-2026-33811

A flaw was found in the `net` package of Go (golang), specifically when using the `LookupCNAME` function with the `cgo` DNS resolver. A remote attacker could exploit this by providing a very long Canonical Name (CNAME) response. This can trigger a double-free of C memory, leading to a crash and a Denial of Service (DoS) for the affected application.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-1341 - Multiple Releases of Same Resource or Handle
Affected products
Fixed 7 products, the same list as for CVE-2026-27145
Known not affected 43 products, the same list as for CVE-2026-27145
Threats
Impact Important
CVE-2026-39820

A flaw was found in the `net/mail` package of the Go programming language. An attacker could provide specially crafted inputs to the `ParseAddress`, `ParseAddressList`, or `ParseDate` functions. This could lead to excessive consumption of CPU and memory resources, resulting in a Denial of Service (DoS) for applications processing these inputs.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-606 - Unchecked Input for Loop Condition
Affected products
Fixed 7 products, the same list as for CVE-2026-27145
Known not affected 43 products, the same list as for CVE-2026-27145
Threats
Impact Important
CVE-2026-39821

A flaw was found in golang.org/x/net/idna. ToASCII and ToUnicode incorrectly accept Punycode-encoded labels that decode to an ASCII-only hostname (for example, xn--example-.com returns example.com instead of an error). Applications that validate the ASCII form then convert to Unicode may grant access to a restricted hostname the ASCII check would have rejected.

8.2 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N
CWE-1289 - Improper Validation of Unsafe Equivalence in Input
Affected products
Fixed 7 products, the same list as for CVE-2026-27145
Known not affected 43 products, the same list as for CVE-2026-27145
Threats
Impact Important
CVE-2026-39828

A flaw was found in golang.org/x/crypto/ssh. A remote attacker could exploit this vulnerability when an SSH server authentication callback returned a PartialSuccessError with non-nil permissions. This flaw caused these permissions to be silently discarded, potentially bypassing certificate restrictions, such as a force-command, after a second authentication factor succeeded. This could lead to unauthorized command execution or access.

8.8 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE-281 - Improper Preservation of Permissions
Affected products
Fixed 7 products, the same list as for CVE-2026-27145
Known not affected 43 products, the same list as for CVE-2026-27145
Threats
Impact Important
CVE-2026-39829

A flaw was found in golang.org/x/crypto/ssh. The RSA and DSA public key parsers in the affected component did not enforce size limits on key parameters. This vulnerability allows an unauthenticated client to provide a crafted public key with an excessively large modulus or DSA parameter during public key authentication. Successful exploitation could lead to a denial of service (DoS) due to prolonged CPU consumption during signature verification.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-1284 - Improper Validation of Specified Quantity in Input
Affected products
Fixed 7 products, the same list as for CVE-2026-27145
Known not affected 43 products, the same list as for CVE-2026-27145
Threats
Impact Important
CVE-2026-39830

A flaw was found in golang.org/x/crypto/ssh. A remote malicious SSH peer can exploit this by sending unsolicited global request responses, which fills an internal buffer and blocks the connection's read loop. This prevents the associated resources from being released, leading to a resource leak per connection. The consequence is a Denial of Service (DoS) for the affected system.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-772 - Missing Release of Resource after Effective Lifetime
Affected products
Fixed 7 products, the same list as for CVE-2026-27145
Known not affected 43 products, the same list as for CVE-2026-27145
Threats
Impact Important
CVE-2026-39832

A flaw was found in golang.org/x/crypto/ssh/agent. When a key was added to a remote agent, security restrictions, known as constraint extensions, were not properly processed during the request. This allowed these restrictions to be silently removed when keys were forwarded, leading to the unrestricted use of the key on the remote host. This vulnerability could enable an attacker to bypass intended security controls and perform unauthorized actions.

8.7 (High)
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
CWE-281 - Improper Preservation of Permissions
Affected products
Fixed 7 products, the same list as for CVE-2026-27145
Known not affected 43 products, the same list as for CVE-2026-27145
Threats
Impact Important
CVE-2026-39833

A flaw was found in golang.org/x/crypto/ssh/agent. The NewKeyring() function, which creates an in-memory keyring, failed to enforce the ConfirmBeforeUse constraint on keys. This allowed keys configured to require user confirmation before use to perform signing operations without any prompt or indication to the user. Consequently, an attacker could potentially bypass intended security controls, leading to unauthorized cryptographic signing actions.

5.5 (Medium)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N
CWE-358 - Improperly Implemented Security Check for Standard
Affected products
Fixed 7 products, the same list as for CVE-2026-27145
Known not affected 43 products, the same list as for CVE-2026-27145
Threats
Impact Moderate
CVE-2026-39835

A flaw was found in golang.org/x/crypto/ssh. SSH servers configured to use CertChecker as a public key callback, without explicitly setting IsUserAuthority or IsHostAuthority, are vulnerable. A remote attacker can exploit this by presenting a specially crafted certificate, causing the server to panic and resulting in a Denial of Service (DoS).

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-476 - NULL Pointer Dereference
Affected products
Fixed 7 products, the same list as for CVE-2026-27145
Known not affected 43 products, the same list as for CVE-2026-27145
Threats
Impact Important
CVE-2026-42151

A flaw was found in Prometheus, an open-source monitoring system. The `client_secret` field within the Azure Active Directory (AD) remote write OAuth configuration was incorrectly handled as a plain string instead of a secure Secret type. This misconfiguration allowed any user or process with access to the `/-/config` HTTP API endpoint to view the Azure OAuth client secret in plaintext. This vulnerability leads to information disclosure, potentially compromising the security of integrated Azure AD services.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE-256 - Plaintext Storage of a Password
Affected products
Fixed 7 products, the same list as for CVE-2026-27145
Known not affected 43 products, the same list as for CVE-2026-27145
Threats
Impact Important
CVE-2026-42499

A flaw was found in the `net/mail` package within the Go standard library. A remote attacker could provide specially crafted, pathological email addresses. When these malformed email addresses are parsed by the `consumePhrase` function, it can lead to excessive resource consumption due to quadratic string concatenation, resulting in a Denial of Service (DoS) condition.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-1046 - Creation of Immutable Text Using String Concatenation
Affected products
Fixed 7 products, the same list as for CVE-2026-27145
Known not affected 43 products, the same list as for CVE-2026-27145
Threats
Impact Important
CVE-2026-42508

A flaw was found in golang.org/x/crypto/ssh/knownhosts. This vulnerability occurs because the system did not correctly check for the revocation status of a SignatureKey belonging to a Certificate Authority (CA). A remote attacker could potentially exploit this by presenting a revoked key, leading to the system accepting it as valid. This could allow an attacker to bypass security checks and potentially gain unauthorized access or spoof legitimate entities.

7.4 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CWE-295 - Improper Certificate Validation
Affected products
Fixed 7 products, the same list as for CVE-2026-27145
Known not affected 43 products, the same list as for CVE-2026-27145
Threats
Impact Important
CVE-2026-46595

A flaw was found in golang.org/x/crypto/ssh. Source-address validation can be skipped when an SSH server configuration uses an authentication callback type other than public key, allowing authorization bypass in misconfigured servers. This is a follow-on to incomplete coverage from the CVE-2024-45337 fix.

7.1 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L
CWE-303 - Incorrect Implementation of Authentication Algorithm
Affected products
Fixed 7 products, the same list as for CVE-2026-27145
Known not affected 43 products, the same list as for CVE-2026-27145
Threats
Impact Important
References
URL Category
https://access.redhat.com/errata/RHSA-2026:36797 self
https://access.redhat.com/documentation/en-us/red… external
https://access.redhat.com/documentation/en-us/red… external
https://access.redhat.com/security/cve/CVE-2026-27145 external
https://access.redhat.com/security/cve/CVE-2026-33811 external
https://access.redhat.com/security/cve/CVE-2026-39820 external
https://access.redhat.com/security/cve/CVE-2026-39821 external
https://access.redhat.com/security/cve/CVE-2026-39828 external
https://access.redhat.com/security/cve/CVE-2026-39829 external
https://access.redhat.com/security/cve/CVE-2026-39830 external
https://access.redhat.com/security/cve/CVE-2026-39832 external
https://access.redhat.com/security/cve/CVE-2026-39833 external
https://access.redhat.com/security/cve/CVE-2026-39835 external
https://access.redhat.com/security/cve/CVE-2026-42151 external
https://access.redhat.com/security/cve/CVE-2026-42499 external
https://access.redhat.com/security/cve/CVE-2026-42508 external
https://access.redhat.com/security/cve/CVE-2026-46595 external
https://access.redhat.com/security/updates/classi… external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2026-27145 self
https://bugzilla.redhat.com/show_bug.cgi?id=2484207 external
https://www.cve.org/CVERecord?id=CVE-2026-27145 external
https://nvd.nist.gov/vuln/detail/CVE-2026-27145 external
https://go.dev/cl/783621 external
https://go.dev/issue/79694 external
https://groups.google.com/g/golang-announce/c/tKs… external
https://pkg.go.dev/vuln/GO-2026-5037 external
https://access.redhat.com/security/cve/CVE-2026-33811 self
https://bugzilla.redhat.com/show_bug.cgi?id=2467822 external
https://www.cve.org/CVERecord?id=CVE-2026-33811 external
https://nvd.nist.gov/vuln/detail/CVE-2026-33811 external
https://go.dev/cl/767860 external
https://go.dev/issue/78803 external
https://groups.google.com/g/golang-announce/c/qcC… external
https://pkg.go.dev/vuln/GO-2026-4981 external
https://access.redhat.com/security/cve/CVE-2026-39820 self
https://bugzilla.redhat.com/show_bug.cgi?id=2467820 external
https://www.cve.org/CVERecord?id=CVE-2026-39820 external
https://nvd.nist.gov/vuln/detail/CVE-2026-39820 external
https://go.dev/cl/759940 external
https://go.dev/issue/78566 external
https://pkg.go.dev/vuln/GO-2026-4986 external
https://access.redhat.com/security/cve/CVE-2026-39821 self
https://bugzilla.redhat.com/show_bug.cgi?id=2480756 external
https://www.cve.org/CVERecord?id=CVE-2026-39821 external
https://nvd.nist.gov/vuln/detail/CVE-2026-39821 external
https://go.dev/cl/767220 external
https://go.dev/issue/78760 external
https://groups.google.com/g/golang-announce/c/iI-… external
https://pkg.go.dev/vuln/GO-2026-5026 external
https://access.redhat.com/security/cve/CVE-2026-39828 self
https://bugzilla.redhat.com/show_bug.cgi?id=2480687 external
https://www.cve.org/CVERecord?id=CVE-2026-39828 external
https://nvd.nist.gov/vuln/detail/CVE-2026-39828 external
https://go.dev/cl/781621 external
https://go.dev/issue/79562 external
https://groups.google.com/g/golang-announce/c/a08… external
https://pkg.go.dev/vuln/GO-2026-5014 external
https://access.redhat.com/security/cve/CVE-2026-39829 self
https://bugzilla.redhat.com/show_bug.cgi?id=2480681 external
https://www.cve.org/CVERecord?id=CVE-2026-39829 external
https://nvd.nist.gov/vuln/detail/CVE-2026-39829 external
https://go.dev/cl/781641 external
https://go.dev/cl/781661 external
https://go.dev/issue/79565 external
https://pkg.go.dev/vuln/GO-2026-5018 external
https://access.redhat.com/security/cve/CVE-2026-39830 self
https://bugzilla.redhat.com/show_bug.cgi?id=2480684 external
https://www.cve.org/CVERecord?id=CVE-2026-39830 external
https://nvd.nist.gov/vuln/detail/CVE-2026-39830 external
https://go.dev/cl/781640 external
https://go.dev/cl/781664 external
https://go.dev/issue/79564 external
https://pkg.go.dev/vuln/GO-2026-5017 external
https://access.redhat.com/security/cve/CVE-2026-39832 self
https://bugzilla.redhat.com/show_bug.cgi?id=2480685 external
https://www.cve.org/CVERecord?id=CVE-2026-39832 external
https://nvd.nist.gov/vuln/detail/CVE-2026-39832 external
https://go.dev/cl/778642 external
https://go.dev/issue/79435 external
https://pkg.go.dev/vuln/GO-2026-5006 external
https://access.redhat.com/security/cve/CVE-2026-39833 self
https://bugzilla.redhat.com/show_bug.cgi?id=2480683 external
https://www.cve.org/CVERecord?id=CVE-2026-39833 external
https://nvd.nist.gov/vuln/detail/CVE-2026-39833 external
https://go.dev/cl/778640 external
https://go.dev/cl/778641 external
https://go.dev/issue/79436 external
https://pkg.go.dev/vuln/GO-2026-5005 external
https://access.redhat.com/security/cve/CVE-2026-39835 self
https://bugzilla.redhat.com/show_bug.cgi?id=2480680 external
https://www.cve.org/CVERecord?id=CVE-2026-39835 external
https://nvd.nist.gov/vuln/detail/CVE-2026-39835 external
https://go.dev/cl/781660 external
https://go.dev/issue/79563 external
https://pkg.go.dev/vuln/GO-2026-5015 external
https://access.redhat.com/security/cve/CVE-2026-42151 self
https://bugzilla.redhat.com/show_bug.cgi?id=2466507 external
https://www.cve.org/CVERecord?id=CVE-2026-42151 external
https://nvd.nist.gov/vuln/detail/CVE-2026-42151 external
https://github.com/prometheus/prometheus/pull/18587 external
https://github.com/prometheus/prometheus/pull/18590 external
https://github.com/prometheus/prometheus/releases… external
https://github.com/prometheus/prometheus/releases… external
https://github.com/prometheus/prometheus/security… external
https://access.redhat.com/security/cve/CVE-2026-42499 self
https://bugzilla.redhat.com/show_bug.cgi?id=2467809 external
https://www.cve.org/CVERecord?id=CVE-2026-42499 external
https://nvd.nist.gov/vuln/detail/CVE-2026-42499 external
https://go.dev/cl/771520 external
https://go.dev/issue/78987 external
https://pkg.go.dev/vuln/GO-2026-4977 external
https://access.redhat.com/security/cve/CVE-2026-42508 self
https://bugzilla.redhat.com/show_bug.cgi?id=2480688 external
https://www.cve.org/CVERecord?id=CVE-2026-42508 external
https://nvd.nist.gov/vuln/detail/CVE-2026-42508 external
https://go.dev/cl/781220 external
https://go.dev/issue/79568 external
https://pkg.go.dev/vuln/GO-2026-5021 external
https://access.redhat.com/security/cve/CVE-2026-46595 self
https://bugzilla.redhat.com/show_bug.cgi?id=2480689 external
https://www.cve.org/CVERecord?id=CVE-2026-46595 external
https://nvd.nist.gov/vuln/detail/CVE-2026-46595 external
https://go.dev/cl/781642 external
https://go.dev/issue/79570 external
https://pkg.go.dev/vuln/GO-2026-5023 external
To clipboard 

{
  "document": {
    "aggregate_severity": {
      "namespace": "https://access.redhat.com/security/updates/classification/",
      "text": "Important"
    },
    "category": "csaf_security_advisory",
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      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2484207"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the `crypto/x509` package of `golang`. This vulnerability allows a remote attacker to cause a Denial of Service (DoS) by presenting a specially crafted X.509 certificate with a large number of DNS Subject Alternative Name (SAN) entries. The certificate verification process, specifically the `VerifyHostname` function, incurs excessive computational overhead due to repeated string operations when processing these entries. This can lead to a significant performance degradation or unresponsiveness of systems validating such certificates.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "A flaw was found in the Go standard library crypto/x509 package. When verifying a TLS certificate hostname, VerifyHostname processed each DNS Subject Alternative Name (SAN) entry in a loop and repeatedly split the candidate hostname on \".\" characters. For certificates with a very large DNS SAN list, CPU use could grow quadratically with the number of SAN entries and hostname labels. Because hostname verification runs before the certificate chain is built, this overhead can occur even when the certificate is not trusted.\n\nRed Hat rates this issue as Important. It affects Red Hat products that include the Go standard library crypto/x509 code from an affected Go toolchain version (before Go 1.25.11, or from Go 1.26.0 through Go 1.26.3). Applications and container images built with a fixed Go release (1.25.11 or later, or 1.26.4 or later) are not affected. Community distributions such as Fedora are also affected.\n\nUpstream fix: Go 1.25.11 and Go 1.26.4 (GO-2026-5037).",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-27145"
        },
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        {
          "category": "external",
          "summary": "https://go.dev/cl/783621",
          "url": "https://go.dev/cl/783621"
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          "summary": "https://go.dev/issue/79694",
          "url": "https://go.dev/issue/79694"
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
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          "details": "Important"
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      "title": "crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries"
    },
    {
      "cve": "CVE-2026-33811",
      "cwe": {
        "id": "CWE-1341",
        "name": "Multiple Releases of Same Resource or Handle"
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      "discovery_date": "2026-05-07T20:01:34.913869+00:00",
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      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2467822"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the `net` package of Go (golang), specifically when using the `LookupCNAME` function with the `cgo` DNS resolver. A remote attacker could exploit this by providing a very long Canonical Name (CNAME) response. This can trigger a double-free of C memory, leading to a crash and a Denial of Service (DoS) for the affected application.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important denial of service vulnerability in the Go `net` package, affecting applications configured to use the `cgo` DNS resolver. A remote attacker could trigger a double-free memory error by providing a very long CNAME response, leading to a crash of the vulnerable application and impacting service availability.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-33811"
        },
        {
          "category": "external",
          "summary": "RHBZ#2467822",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2467822"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-33811",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-33811"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-33811",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33811"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/767860",
          "url": "https://go.dev/cl/767860"
        },
        {
          "category": "external",
          "summary": "https://go.dev/issue/78803",
          "url": "https://go.dev/issue/78803"
        },
        {
          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M",
          "url": "https://groups.google.com/g/golang-announce/c/qcCIEXso47M"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-4981",
          "url": "https://pkg.go.dev/vuln/GO-2026-4981"
        }
      ],
      "release_date": "2026-05-07T19:41:19.285000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-07-08T15:46:32+00:00",
          "details": "The RHTAS CLI Stack images contain Red Hat Trusted Artifact Signer CLI binaries.\n\nFor details on using the CLI images, refer to the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.4\n\nYou can find the release notes for this version of Red Hat Trusted Artifact Signer at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.4/html-single/release_notes/index",
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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
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      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME"
    },
    {
      "cve": "CVE-2026-39820",
      "cwe": {
        "id": "CWE-606",
        "name": "Unchecked Input for Loop Condition"
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      "discovery_date": "2026-05-07T20:01:27.800929+00:00",
      "flags": [
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      "ids": [
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          "text": "2467820"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the `net/mail` package of the Go programming language. An attacker could provide specially crafted inputs to the `ParseAddress`, `ParseAddressList`, or `ParseDate` functions. This could lead to excessive consumption of CPU and memory resources, resulting in a Denial of Service (DoS) for applications processing these inputs.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "net/mail: golang: Go net/mail: Denial of Service via crafted email inputs",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important denial of service vulnerability in the Go `net/mail` package. Applications processing untrusted email inputs via `ParseAddress`, `ParseAddressList`, or `ParseDate` functions are susceptible to excessive resource consumption, which can lead to service unavailability.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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          "category": "self",
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      "scores": [
        {
          "cvss_v3": {
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
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      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "net/mail: golang: Go net/mail: Denial of Service via crafted email inputs"
    },
    {
      "cve": "CVE-2026-39821",
      "cwe": {
        "id": "CWE-1289",
        "name": "Improper Validation of Unsafe Equivalence in Input"
      },
      "discovery_date": "2026-05-22T16:00:52.844126+00:00",
      "flags": [
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          "label": "vulnerable_code_not_present",
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      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2480756"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in golang.org/x/net/idna. ToASCII and ToUnicode incorrectly accept Punycode-encoded labels that decode to an ASCII-only hostname (for example, xn--example-.com returns example.com instead of an error). Applications that validate the ASCII form then convert to Unicode may grant access to a restricted hostname the ASCII check would have rejected.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "golang.org/x/net/idna is vulnerable to privilege escalation through incorrect Punycode label handling in ToASCII and ToUnicode. An attacker who can supply a Punycode hostname that passes an ASCII-only authorization check may have it normalized to a restricted ASCII name the application intended to block. Red Hat exposure is broad across products shipping the Go toolchain or bundling golang.org/x/net, including RHEL and RHEL-AI golang RPMs, hummingbird Go runtimes, OpenShift and ODF container builds, and Ceph/OpenShift components compiled against affected x/net versions.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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      "references": [
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          "category": "self",
          "summary": "Canonical URL",
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        {
          "category": "external",
          "summary": "https://go.dev/cl/767220",
          "url": "https://go.dev/cl/767220"
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          "summary": "https://go.dev/issue/78760",
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      "release_date": "2026-05-22T15:01:21.462000+00:00",
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          "details": "The RHTAS CLI Stack images contain Red Hat Trusted Artifact Signer CLI binaries.\n\nFor details on using the CLI images, refer to the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.4\n\nYou can find the release notes for this version of Red Hat Trusted Artifact Signer at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.4/html-single/release_notes/index",
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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:N",
            "version": "3.1"
          },
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      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "golang.org/x/net/idna: golang: net/http: golang.org/x/net/idna: Privilege escalation via incorrect Punycode label processing"
    },
    {
      "cve": "CVE-2026-39828",
      "cwe": {
        "id": "CWE-281",
        "name": "Improper Preservation of Permissions"
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      "discovery_date": "2026-05-22T04:01:46.775641+00:00",
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      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2480687"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in golang.org/x/crypto/ssh. A remote attacker could exploit this vulnerability when an SSH server authentication callback returned a PartialSuccessError with non-nil permissions. This flaw caused these permissions to be silently discarded, potentially bypassing certificate restrictions, such as a force-command, after a second authentication factor succeeded. This could lead to unauthorized command execution or access.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Unauthorized command execution via discarded SSH permissions",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important security flaw in the `golang.org/x/crypto/ssh` library. When an SSH server utilizing this library is configured with specific authentication callbacks that return a `PartialSuccessError` with non-nil permissions, an attacker could bypass intended certificate restrictions, such as `force-command`. This bypass could lead to unauthorized command execution or access on affected Red Hat systems configured with multi-factor authentication and certificate-based access controls.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
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      "references": [
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          "category": "self",
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      "release_date": "2026-05-22T02:31:26.883000+00:00",
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      "scores": [
        {
          "cvss_v3": {
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
          },
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      "threats": [
        {
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          "details": "Important"
        }
      ],
      "title": "golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Unauthorized command execution via discarded SSH permissions"
    },
    {
      "cve": "CVE-2026-39829",
      "cwe": {
        "id": "CWE-1284",
        "name": "Improper Validation of Specified Quantity in Input"
      },
      "discovery_date": "2026-05-22T04:01:30.092249+00:00",
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      "ids": [
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          "text": "2480681"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in golang.org/x/crypto/ssh. The RSA and DSA public key parsers in the affected component did not enforce size limits on key parameters. This vulnerability allows an unauthenticated client to provide a crafted public key with an excessively large modulus or DSA parameter during public key authentication. Successful exploitation could lead to a denial of service (DoS) due to prolonged CPU consumption during signature verification.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via crafted public key with excessive parameters",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability in golang.org/x/crypto/ssh is rated as Important. An unauthenticated remote attacker could trigger a denial of service by providing a specially crafted public key with excessively large parameters during SSH public key authentication. This could lead to prolonged CPU consumption on the server, impacting service availability.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
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          "category": "self",
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      "release_date": "2026-05-22T02:31:27.324000+00:00",
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            "baseScore": 7.5,
            "baseSeverity": "HIGH",
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            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
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      ],
      "title": "golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via crafted public key with excessive parameters"
    },
    {
      "cve": "CVE-2026-39830",
      "cwe": {
        "id": "CWE-772",
        "name": "Missing Release of Resource after Effective Lifetime"
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      "discovery_date": "2026-05-22T04:01:38.517202+00:00",
      "flags": [
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      "ids": [
        {
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          "text": "2480684"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in golang.org/x/crypto/ssh. A remote malicious SSH peer can exploit this by sending unsolicited global request responses, which fills an internal buffer and blocks the connection\u0027s read loop. This prevents the associated resources from being released, leading to a resource leak per connection. The consequence is a Denial of Service (DoS) for the affected system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via resource leak from unsolicited SSH responses",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important denial of service flaw in `golang.org/x/crypto/ssh`. A remote, unauthenticated attacker can exploit this vulnerability by sending unsolicited global request responses to an affected SSH server, leading to resource exhaustion and a denial of service. The impact is considered Important due to the potential for unauthenticated remote disruption of services utilizing the vulnerable SSH library.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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          "details": "The RHTAS CLI Stack images contain Red Hat Trusted Artifact Signer CLI binaries.\n\nFor details on using the CLI images, refer to the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.4\n\nYou can find the release notes for this version of Red Hat Trusted Artifact Signer at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.4/html-single/release_notes/index",
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            "baseScore": 7.5,
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            "integrityImpact": "NONE",
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      "threats": [
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          "details": "Important"
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      ],
      "title": "golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via resource leak from unsolicited SSH responses"
    },
    {
      "cve": "CVE-2026-39832",
      "cwe": {
        "id": "CWE-281",
        "name": "Improper Preservation of Permissions"
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      "discovery_date": "2026-05-22T04:01:41.402561+00:00",
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      "ids": [
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          "text": "2480685"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in golang.org/x/crypto/ssh/agent. When a key was added to a remote agent, security restrictions, known as constraint extensions, were not properly processed during the request. This allowed these restrictions to be silently removed when keys were forwarded, leading to the unrestricted use of the key on the remote host. This vulnerability could enable an attacker to bypass intended security controls and perform unauthorized actions.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "golang.org/x/crypto/ssh/agent: golang.org/x/crypto/ssh/agent: Security bypass due to improper handling of key restrictions",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This Important vulnerability in `golang.org/x/crypto/ssh/agent` allows for a security bypass when SSH keys with destination restrictions are forwarded via an SSH agent. This flaw could lead to unintended exposure of SSH keys, enabling an attacker to use the forwarded key without the specified restrictions on remote hosts. Red Hat products utilizing `golang.org/x/crypto/ssh/agent` for key forwarding may be affected if users rely on constraint extensions for limiting key usage.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N",
            "version": "3.1"
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      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "golang.org/x/crypto/ssh/agent: golang.org/x/crypto/ssh/agent: Security bypass due to improper handling of key restrictions"
    },
    {
      "cve": "CVE-2026-39833",
      "cwe": {
        "id": "CWE-358",
        "name": "Improperly Implemented Security Check for Standard"
      },
      "discovery_date": "2026-05-22T04:01:35.714593+00:00",
      "flags": [
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          "label": "vulnerable_code_not_present",
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      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2480683"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in golang.org/x/crypto/ssh/agent. The NewKeyring() function, which creates an in-memory keyring, failed to enforce the ConfirmBeforeUse constraint on keys. This allowed keys configured to require user confirmation before use to perform signing operations without any prompt or indication to the user. Consequently, an attacker could potentially bypass intended security controls, leading to unauthorized cryptographic signing actions.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "golang.org/x/crypto/ssh/agent: golang.org/x/crypto/ssh/agent: Security bypass due to unenforced key confirmation",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Red Hat rates this issue as Moderate with RH CVSS 5.5 (CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N). A flaw was found in golang.org/x/crypto/ssh/agent where the in-memory keyring returned by NewKeyring() silently accepted SSH agent keys with the ConfirmBeforeUse constraint but did not enforce interactive confirmation before signing. Exploitation requires local access and low privileges on a system where an affected application uses NewKeyring() with ConfirmBeforeUse. Most Red Hat products that bundle golang.org/x/crypto do not use the ssh/agent ConfirmBeforeUse feature in their supported execution paths. The upstream CISA CVSS 9.1 assumes a broader network attack context that does not reflect Red Hat product deployment.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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      "references": [
        {
          "category": "self",
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          "url": "https://access.redhat.com/security/cve/CVE-2026-39833"
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      "release_date": "2026-05-22T02:31:26.294000+00:00",
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            "category": "none"
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          "url": "https://access.redhat.com/errata/RHSA-2026:36797"
        },
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          "category": "workaround",
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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "LOCAL",
            "availabilityImpact": "NONE",
            "baseScore": 5.5,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "NONE",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N",
            "version": "3.1"
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      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "golang.org/x/crypto/ssh/agent: golang.org/x/crypto/ssh/agent: Security bypass due to unenforced key confirmation"
    },
    {
      "cve": "CVE-2026-39835",
      "cwe": {
        "id": "CWE-476",
        "name": "NULL Pointer Dereference"
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      "discovery_date": "2026-05-22T04:01:27.279943+00:00",
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      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2480680"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in golang.org/x/crypto/ssh. SSH servers configured to use CertChecker as a public key callback, without explicitly setting IsUserAuthority or IsHostAuthority, are vulnerable. A remote attacker can exploit this by presenting a specially crafted certificate, causing the server to panic and resulting in a Denial of Service (DoS).",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "golang.org/x/crypto/ssh: golang: golang.org/x/crypto/ssh: Denial of Service via crafted SSH certificate",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important denial of service flaw in `golang.org/x/crypto/ssh` affecting SSH servers that utilize `CertChecker` as a public key callback without explicitly configuring `IsUserAuthority` or `IsHostAuthority`. A remote, unauthenticated attacker can trigger a server panic by presenting a specially crafted certificate, leading to service disruption. Exploitation requires a specific, non-default configuration of the `CertChecker`.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
        }
      ],
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-39835"
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        {
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          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39835"
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        {
          "category": "external",
          "summary": "https://go.dev/cl/781660",
          "url": "https://go.dev/cl/781660"
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        {
          "category": "external",
          "summary": "https://go.dev/issue/79563",
          "url": "https://go.dev/issue/79563"
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          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI",
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      "release_date": "2026-05-22T02:31:26.982000+00:00",
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          "date": "2026-07-08T15:46:32+00:00",
          "details": "The RHTAS CLI Stack images contain Red Hat Trusted Artifact Signer CLI binaries.\n\nFor details on using the CLI images, refer to the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.4\n\nYou can find the release notes for this version of Red Hat Trusted Artifact Signer at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.4/html-single/release_notes/index",
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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      "threats": [
        {
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          "details": "Important"
        }
      ],
      "title": "golang.org/x/crypto/ssh: golang: golang.org/x/crypto/ssh: Denial of Service via crafted SSH certificate"
    },
    {
      "cve": "CVE-2026-42151",
      "cwe": {
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        {
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          "text": "2466507"
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      "notes": [
        {
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          "text": "A flaw was found in Prometheus, an open-source monitoring system. The `client_secret` field within the Azure Active Directory (AD) remote write OAuth configuration was incorrectly handled as a plain string instead of a secure Secret type. This misconfiguration allowed any user or process with access to the `/-/config` HTTP API endpoint to view the Azure OAuth client secret in plaintext. This vulnerability leads to information disclosure, potentially compromising the security of integrated Azure AD services.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "github.com/prometheus/prometheus: Prometheus: Information disclosure of Azure OAuth client secret via config API",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This Important information disclosure flaw in Prometheus affects instances configured to use Azure AD remote write with OAuth authentication. The client secret, intended to be a secure credential, is exposed in plaintext through the `/-/config` HTTP API endpoint. This could allow an attacker with access to this endpoint to retrieve the secret, potentially compromising integrated Azure AD services.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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    },
    {
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      "cwe": {
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          "text": "A flaw was found in the `net/mail` package within the Go standard library. A remote attacker could provide specially crafted, pathological email addresses. When these malformed email addresses are parsed by the `consumePhrase` function, it can lead to excessive resource consumption due to quadratic string concatenation, resulting in a Denial of Service (DoS) condition.",
          "title": "Vulnerability description"
        },
        {
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          "text": "net/mail: golang: net/mail: Denial of Service via pathological email address parsing",
          "title": "Vulnerability summary"
        },
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          "text": "This is an Important denial of service vulnerability in the `net/mail` package of the Go standard library. A remote attacker can exploit this flaw by sending specially crafted email addresses, leading to excessive resource consumption and a denial of service in Go applications that parse email addresses using the affected library.",
          "title": "Statement"
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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      "title": "net/mail: golang: net/mail: Denial of Service via pathological email address parsing"
    },
    {
      "cve": "CVE-2026-42508",
      "cwe": {
        "id": "CWE-295",
        "name": "Improper Certificate Validation"
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      "discovery_date": "2026-05-22T04:01:49.515058+00:00",
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      "ids": [
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          "text": "2480688"
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      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in golang.org/x/crypto/ssh/knownhosts. This vulnerability occurs because the system did not correctly check for the revocation status of a SignatureKey belonging to a Certificate Authority (CA). A remote attacker could potentially exploit this by presenting a revoked key, leading to the system accepting it as valid. This could allow an attacker to bypass security checks and potentially gain unauthorized access or spoof legitimate entities.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "golang.org/x/crypto/ssh/knownhosts: golang: golang.org/x/crypto/ssh/knownhosts: Revocation bypass via unchecked SignatureKey",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "Important: A flaw in `golang.org/x/crypto/ssh/knownhosts` allows a remote attacker to bypass security checks. This vulnerability arises because the system fails to properly verify the revocation status of a Certificate Authority (CA) `SignatureKey`. In Red Hat environments, this could enable an attacker to present a revoked key, leading to its acceptance as valid and potentially granting unauthorized access or facilitating the spoofing of legitimate entities.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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          "category": "self",
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          "summary": "https://go.dev/cl/781220",
          "url": "https://go.dev/cl/781220"
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      "release_date": "2026-05-22T02:31:27.644000+00:00",
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          "category": "vendor_fix",
          "date": "2026-07-08T15:46:32+00:00",
          "details": "The RHTAS CLI Stack images contain Red Hat Trusted Artifact Signer CLI binaries.\n\nFor details on using the CLI images, refer to the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.4\n\nYou can find the release notes for this version of Red Hat Trusted Artifact Signer at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.4/html-single/release_notes/index",
          "product_ids": [
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            "Red Hat Trusted Artifact Signer 1.4:conforma-cli-stack-v1-4@amd64_windows",
            "Red Hat Trusted Artifact Signer 1.4:conforma-cli-stack-v1-4@arm64",
            "Red Hat Trusted Artifact Signer 1.4:conforma-cli-stack-v1-4@arm64_darwin",
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          "restart_required": {
            "category": "none"
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          "url": "https://access.redhat.com/errata/RHSA-2026:36797"
        }
      ],
      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.4,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N",
            "version": "3.1"
          },
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      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "golang.org/x/crypto/ssh/knownhosts: golang: golang.org/x/crypto/ssh/knownhosts: Revocation bypass via unchecked SignatureKey"
    },
    {
      "cve": "CVE-2026-46595",
      "cwe": {
        "id": "CWE-303",
        "name": "Incorrect Implementation of Authentication Algorithm"
      },
      "discovery_date": "2026-05-22T04:01:52.215134+00:00",
      "flags": [
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          "label": "vulnerable_code_not_present",
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      "ids": [
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          "text": "2480689"
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      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in golang.org/x/crypto/ssh. Source-address validation can be skipped when an SSH server configuration uses an authentication callback type other than public key, allowing authorization bypass in misconfigured servers. This is a follow-on to incomplete coverage from the CVE-2024-45337 fix.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Authorization bypass due to skipped source-address validation",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "golang.org/x/crypto/ssh is vulnerable to authorization bypass when SSH server configurations rely on source-address validation alongside non-public-key authentication callbacks. An attacker with low privileges who can authenticate through such a callback path may bypass intended source-address restrictions and gain unauthorized SSH access. Red Hat impact sits in services built with affected x/crypto/ssh, including RHEL golang streams, hummingbird Go toolchains, RHACM/MCE agents, and OpenShift or Ceph components that embed Go SSH servers with mixed callback types.",
          "title": "Statement"
        },
        {
          "category": "general",
          "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product\u0027s status, and are included for informational purposes to better understand the severity of this vulnerability.",
          "title": "CVSS score applicability"
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-46595"
        },
        {
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        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-46595",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-46595"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-46595",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-46595"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/781642",
          "url": "https://go.dev/cl/781642"
        },
        {
          "category": "external",
          "summary": "https://go.dev/issue/79570",
          "url": "https://go.dev/issue/79570"
        },
        {
          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI",
          "url": "https://groups.google.com/g/golang-announce/c/a082jnz-LvI"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-5023",
          "url": "https://pkg.go.dev/vuln/GO-2026-5023"
        }
      ],
      "release_date": "2026-05-22T02:31:27.894000+00:00",
      "remediations": [
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          "date": "2026-07-08T15:46:32+00:00",
          "details": "The RHTAS CLI Stack images contain Red Hat Trusted Artifact Signer CLI binaries.\n\nFor details on using the CLI images, refer to the product documentation at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.4\n\nYou can find the release notes for this version of Red Hat Trusted Artifact Signer at https://access.redhat.com/documentation/en-us/red_hat_trusted_artifact_signer/1.4/html-single/release_notes/index",
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          "restart_required": {
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        }
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      "scores": [
        {
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            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:L",
            "version": "3.1"
          },
          "products": [
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            "Red Hat Trusted Artifact Signer 1.4:fetch-tsa-certs-cli-stack-v1-4@amd64_windows",
            "Red Hat Trusted Artifact Signer 1.4:fetch-tsa-certs-cli-stack-v1-4@arm64",
            "Red Hat Trusted Artifact Signer 1.4:fetch-tsa-certs-cli-stack-v1-4@arm64_darwin",
            "Red Hat Trusted Artifact Signer 1.4:fetch-tsa-certs-cli-stack-v1-4@ppc64le",
            "Red Hat Trusted Artifact Signer 1.4:fetch-tsa-certs-cli-stack-v1-4@s390x",
            "Red Hat Trusted Artifact Signer 1.4:gitsign-cli-stack-v1-4@amd64",
            "Red Hat Trusted Artifact Signer 1.4:gitsign-cli-stack-v1-4@amd64_darwin",
            "Red Hat Trusted Artifact Signer 1.4:gitsign-cli-stack-v1-4@amd64_windows",
            "Red Hat Trusted Artifact Signer 1.4:gitsign-cli-stack-v1-4@arm64",
            "Red Hat Trusted Artifact Signer 1.4:gitsign-cli-stack-v1-4@arm64_darwin",
            "Red Hat Trusted Artifact Signer 1.4:gitsign-cli-stack-v1-4@ppc64le",
            "Red Hat Trusted Artifact Signer 1.4:gitsign-cli-stack-v1-4@s390x",
            "Red Hat Trusted Artifact Signer 1.4:model-transparency-cli-stack-v1-4@amd64",
            "Red Hat Trusted Artifact Signer 1.4:model-transparency-cli-stack-v1-4@amd64_darwin",
            "Red Hat Trusted Artifact Signer 1.4:model-transparency-cli-stack-v1-4@amd64_windows",
            "Red Hat Trusted Artifact Signer 1.4:model-transparency-cli-stack-v1-4@arm64",
            "Red Hat Trusted Artifact Signer 1.4:model-transparency-cli-stack-v1-4@arm64_darwin",
            "Red Hat Trusted Artifact Signer 1.4:model-transparency-cli-stack-v1-4@ppc64le",
            "Red Hat Trusted Artifact Signer 1.4:model-transparency-cli-stack-v1-4@s390x",
            "Red Hat Trusted Artifact Signer 1.4:rekor-cli-stack-v1-4@amd64",
            "Red Hat Trusted Artifact Signer 1.4:rekor-cli-stack-v1-4@amd64_darwin",
            "Red Hat Trusted Artifact Signer 1.4:rekor-cli-stack-v1-4@amd64_windows",
            "Red Hat Trusted Artifact Signer 1.4:rekor-cli-stack-v1-4@arm64",
            "Red Hat Trusted Artifact Signer 1.4:rekor-cli-stack-v1-4@arm64_darwin",
            "Red Hat Trusted Artifact Signer 1.4:rekor-cli-stack-v1-4@ppc64le",
            "Red Hat Trusted Artifact Signer 1.4:rekor-cli-stack-v1-4@s390x",
            "Red Hat Trusted Artifact Signer 1.4:trillian-cli-stack-v1-4@amd64",
            "Red Hat Trusted Artifact Signer 1.4:trillian-cli-stack-v1-4@amd64_darwin",
            "Red Hat Trusted Artifact Signer 1.4:trillian-cli-stack-v1-4@amd64_windows",
            "Red Hat Trusted Artifact Signer 1.4:trillian-cli-stack-v1-4@arm64",
            "Red Hat Trusted Artifact Signer 1.4:trillian-cli-stack-v1-4@arm64_darwin",
            "Red Hat Trusted Artifact Signer 1.4:trillian-cli-stack-v1-4@ppc64le",
            "Red Hat Trusted Artifact Signer 1.4:trillian-cli-stack-v1-4@s390x",
            "Red Hat Trusted Artifact Signer 1.4:tuftool-cli-stack-v1-4@amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Authorization bypass due to skipped source-address validation"
    }
  ]
}



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Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.