RHSA-2026:42047

Vulnerability from csaf_redhat - Published: 2026-07-20 13:55 - Updated: 2026-07-21 15:52
Summary
Red Hat Security Advisory: Red Hat Web Terminal Operator 1.12.1 release.
Severity
Important
Notes
Topic: Red Hat Web Terminal Operator 1.12.1 has been released.
Details: The Web Terminal provides a way to access a fully in-browser terminal emulator within the OpenShift Console. Command-line tools for interacting with the OpenShift cluster are pre-installed.
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.

A flaw was found in golang. A remote attacker could exploit this vulnerability by providing a specially crafted certificate during the error string construction process within the `HostnameError.Error()` function. This flaw, caused by unbounded string concatenation, leads to excessive resource consumption. Successful exploitation can result in a denial of service (DoS) for the affected system.

CWE-1050 - Excessive Platform Resource Consumption within a Loop
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:423baadb7daeaf78b5df584e7e5e8f2ad991e0db803a22ec7a90f7d468e55415_amd64
Vendor Fix fix
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:7319fa6637e0c4111633194a7e83d0105dda2ee161040eed6901cb7e45b6ad97_amd64
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:d32c93e5c790ad660161326837341f968ce0ed9bfd7ad2232ee27a2b56ef2526_amd64
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64
Threats
Impact Important

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.

CWE-606 - Unchecked Input for Loop Condition
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:423baadb7daeaf78b5df584e7e5e8f2ad991e0db803a22ec7a90f7d468e55415_amd64
Vendor Fix fix
Workaround
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:7319fa6637e0c4111633194a7e83d0105dda2ee161040eed6901cb7e45b6ad97_amd64
Workaround
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:d32c93e5c790ad660161326837341f968ce0ed9bfd7ad2232ee27a2b56ef2526_amd64
Workaround
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64
Workaround
Threats
Impact Important

A flaw was found in the Go standard library packages `crypto/x509` and `crypto/tls`. During the process of building a certificate chain, an attacker can provide a large number of intermediate certificates. This excessive input is not properly limited, leading to an uncontrolled amount of work being performed. This can result in a denial of service (DoS) condition, making the affected system or application unavailable to legitimate users.

CWE-770 - Allocation of Resources Without Limits or Throttling
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:423baadb7daeaf78b5df584e7e5e8f2ad991e0db803a22ec7a90f7d468e55415_amd64
Vendor Fix fix
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:7319fa6637e0c4111633194a7e83d0105dda2ee161040eed6901cb7e45b6ad97_amd64
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:d32c93e5c790ad660161326837341f968ce0ed9bfd7ad2232ee27a2b56ef2526_amd64
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64
Threats
Impact Important

A flaw was found in Go's `crypto/x509` package. A remote attacker could exploit this by presenting a specially crafted certificate chain containing a large number of policy mappings. This inefficient validation process consumes excessive resources, which can lead to a denial of service (DoS) for applications or systems performing certificate validation.

CWE-1050 - Excessive Platform Resource Consumption within a Loop
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:423baadb7daeaf78b5df584e7e5e8f2ad991e0db803a22ec7a90f7d468e55415_amd64
Vendor Fix fix
Workaround
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:7319fa6637e0c4111633194a7e83d0105dda2ee161040eed6901cb7e45b6ad97_amd64
Workaround
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:d32c93e5c790ad660161326837341f968ce0ed9bfd7ad2232ee27a2b56ef2526_amd64
Workaround
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64
Workaround
Threats
Impact Moderate

A flaw was found in the internal/syscall/unix package in the Go standard library. If the target of the `Root.Chmod` function is replaced with a symbolic link during execution, specifically after `Root.Chmod` checks the target but before acting, the `chmod` operation will be performed on the file the symbolic link points to. This issue can bypass directory restrictions and lead to unauthorized permission changes on the filesystem.

CWE-367 - Time-of-check Time-of-use (TOCTOU) Race Condition
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:423baadb7daeaf78b5df584e7e5e8f2ad991e0db803a22ec7a90f7d468e55415_amd64
Vendor Fix fix
Workaround
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:7319fa6637e0c4111633194a7e83d0105dda2ee161040eed6901cb7e45b6ad97_amd64
Workaround
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:d32c93e5c790ad660161326837341f968ce0ed9bfd7ad2232ee27a2b56ef2526_amd64
Workaround
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64
Workaround
Threats
Impact Moderate

A flaw was found in the `crypto/x509` package within Go (golang). When verifying a certificate chain, excluded DNS (Domain Name System) constraints are not correctly applied to wildcard DNS Subject Alternative Names (SANs) if the case of the SAN differs from the constraint. This oversight could allow an attacker to bypass certificate validation, potentially leading to the acceptance of a malicious certificate that should have been rejected. This issue specifically impacts the validation of trusted certificate chains.

CWE-1289 - Improper Validation of Unsafe Equivalence in Input
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:423baadb7daeaf78b5df584e7e5e8f2ad991e0db803a22ec7a90f7d468e55415_amd64
Vendor Fix fix
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:7319fa6637e0c4111633194a7e83d0105dda2ee161040eed6901cb7e45b6ad97_amd64
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:d32c93e5c790ad660161326837341f968ce0ed9bfd7ad2232ee27a2b56ef2526_amd64
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64
Threats
Impact Important

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.

CWE-1341 - Multiple Releases of Same Resource or Handle
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:423baadb7daeaf78b5df584e7e5e8f2ad991e0db803a22ec7a90f7d468e55415_amd64
Vendor Fix fix
Workaround
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:7319fa6637e0c4111633194a7e83d0105dda2ee161040eed6901cb7e45b6ad97_amd64
Workaround
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:d32c93e5c790ad660161326837341f968ce0ed9bfd7ad2232ee27a2b56ef2526_amd64
Workaround
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64
Workaround
Threats
Impact Important

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.

CWE-1289 - Improper Validation of Unsafe Equivalence in Input
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:423baadb7daeaf78b5df584e7e5e8f2ad991e0db803a22ec7a90f7d468e55415_amd64
Vendor Fix fix
Workaround
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:7319fa6637e0c4111633194a7e83d0105dda2ee161040eed6901cb7e45b6ad97_amd64
Workaround
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:d32c93e5c790ad660161326837341f968ce0ed9bfd7ad2232ee27a2b56ef2526_amd64
Workaround
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64
Workaround
Threats
Impact Important

A flaw was found in the Golang MIME (Multipurpose Internet Mail Extensions) package. A remote attacker could exploit this vulnerability by sending a maliciously-crafted MIME header containing many invalid encoded-words. This could lead to excessive CPU consumption, resulting in a Denial of Service (DoS) for the affected system.

CWE-1050 - Excessive Platform Resource Consumption within a Loop
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:423baadb7daeaf78b5df584e7e5e8f2ad991e0db803a22ec7a90f7d468e55415_amd64
Vendor Fix fix
Workaround
Product Identifier Version Remediation
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:7319fa6637e0c4111633194a7e83d0105dda2ee161040eed6901cb7e45b6ad97_amd64
Workaround
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:d32c93e5c790ad660161326837341f968ce0ed9bfd7ad2232ee27a2b56ef2526_amd64
Workaround
Unresolved product id: Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64
Workaround
Threats
Impact Important
References
URL Category
https://access.redhat.com/errata/RHSA-2026:42047 self
https://access.redhat.com/security/cve/CVE-2025-61729 external
https://access.redhat.com/security/cve/CVE-2026-27145 external
https://access.redhat.com/security/cve/CVE-2026-32280 external
https://access.redhat.com/security/cve/CVE-2026-32281 external
https://access.redhat.com/security/cve/CVE-2026-32282 external
https://access.redhat.com/security/cve/CVE-2026-33810 external
https://access.redhat.com/security/cve/CVE-2026-33811 external
https://access.redhat.com/security/cve/CVE-2026-39821 external
https://access.redhat.com/security/cve/CVE-2026-42504 external
https://access.redhat.com/security/updates/classi… external
https://redhat.atlassian.net/browse/WTO-359 external
https://redhat.atlassian.net/browse/WTO-402 external
https://redhat.atlassian.net/browse/WTO-407 external
https://redhat.atlassian.net/browse/WTO-413 external
https://redhat.atlassian.net/browse/WTO-418 external
https://redhat.atlassian.net/browse/WTO-429 external
https://redhat.atlassian.net/browse/WTO-433 external
https://redhat.atlassian.net/browse/WTO-448 external
https://redhat.atlassian.net/browse/WTO-450 external
https://security.access.redhat.com/data/csaf/v2/a… self
https://access.redhat.com/security/cve/CVE-2025-61729 self
https://bugzilla.redhat.com/show_bug.cgi?id=2418462 external
https://www.cve.org/CVERecord?id=CVE-2025-61729 external
https://nvd.nist.gov/vuln/detail/CVE-2025-61729 external
https://go.dev/cl/725920 external
https://go.dev/issue/76445 external
https://groups.google.com/g/golang-announce/c/8FJ… external
https://pkg.go.dev/vuln/GO-2025-4155 external
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-2026-32280 self
https://bugzilla.redhat.com/show_bug.cgi?id=2456339 external
https://www.cve.org/CVERecord?id=CVE-2026-32280 external
https://nvd.nist.gov/vuln/detail/CVE-2026-32280 external
https://go.dev/cl/758320 external
https://go.dev/issue/78282 external
https://groups.google.com/g/golang-announce/c/0uY… external
https://pkg.go.dev/vuln/GO-2026-4947 external
https://access.redhat.com/security/cve/CVE-2026-32281 self
https://bugzilla.redhat.com/show_bug.cgi?id=2456333 external
https://www.cve.org/CVERecord?id=CVE-2026-32281 external
https://nvd.nist.gov/vuln/detail/CVE-2026-32281 external
https://go.dev/cl/758061 external
https://go.dev/issue/78281 external
https://pkg.go.dev/vuln/GO-2026-4946 external
https://access.redhat.com/security/cve/CVE-2026-32282 self
https://bugzilla.redhat.com/show_bug.cgi?id=2456336 external
https://www.cve.org/CVERecord?id=CVE-2026-32282 external
https://nvd.nist.gov/vuln/detail/CVE-2026-32282 external
https://go.dev/cl/763761 external
https://go.dev/issue/78293 external
https://pkg.go.dev/vuln/GO-2026-4864 external
https://access.redhat.com/security/cve/CVE-2026-33810 self
https://bugzilla.redhat.com/show_bug.cgi?id=2456335 external
https://www.cve.org/CVERecord?id=CVE-2026-33810 external
https://nvd.nist.gov/vuln/detail/CVE-2026-33810 external
https://go.dev/cl/763763 external
https://go.dev/issue/78332 external
https://pkg.go.dev/vuln/GO-2026-4866 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-2026-39821 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-2026-42504 self
https://bugzilla.redhat.com/show_bug.cgi?id=2484204 external
https://www.cve.org/CVERecord?id=CVE-2026-42504 external
https://nvd.nist.gov/vuln/detail/CVE-2026-42504 external
https://go.dev/cl/774481 external
https://go.dev/issue/79217 external
https://pkg.go.dev/vuln/GO-2026-5038 external

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      "title": "crypto/x509: golang: Denial of Service due to excessive resource consumption via crafted certificate"
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          "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"
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          "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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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:42047"
        },
        {
          "category": "workaround",
          "details": "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).",
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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",
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      "title": "crypto/x509: golang: golang crypto/x509: Denial of Service via excessive processing of DNS SAN entries"
    },
    {
      "cve": "CVE-2026-32280",
      "cwe": {
        "id": "CWE-770",
        "name": "Allocation of Resources Without Limits or Throttling"
      },
      "discovery_date": "2026-04-08T02:01:19.572351+00:00",
      "flags": [
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        {
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          "title": "Vulnerability description"
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          "text": "crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important denial of service vulnerability in the Go standard library\u0027s certificate chain building process. Systems utilizing Go applications that process untrusted TLS certificates or X.509 certificate chains are susceptible to resource exhaustion when presented with an excessive number of intermediate certificates, potentially leading to service unavailability. This flaw impacts applications directly using `crypto/x509` or `crypto/tls`.",
          "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"
        }
      ],
      "product_status": {
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          "category": "external",
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        },
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          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-32280",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32280"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/758320",
          "url": "https://go.dev/cl/758320"
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        {
          "category": "external",
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          "url": "https://go.dev/issue/78282"
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          "summary": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU",
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        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-4947",
          "url": "https://pkg.go.dev/vuln/GO-2026-4947"
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          ],
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        {
          "cvss_v3": {
            "attackComplexity": "LOW",
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            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
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      "title": "crypto/x509: crypto/tls: golang: Go: Denial of Service vulnerability in certificate chain building"
    },
    {
      "cve": "CVE-2026-32281",
      "cwe": {
        "id": "CWE-1050",
        "name": "Excessive Platform Resource Consumption within a Loop"
      },
      "discovery_date": "2026-04-08T02:01:00.930989+00:00",
      "flags": [
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        {
          "category": "description",
          "text": "A flaw was found in Go\u0027s `crypto/x509` package. A remote attacker could exploit this by presenting a specially crafted certificate chain containing a large number of policy mappings. This inefficient validation process consumes excessive resources, which can lead to a denial of service (DoS) for applications or systems performing certificate validation.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "crypto/x509: golang: Go crypto/x509: Denial of Service via inefficient certificate chain validation",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This flaw occurs during the validation of otherwise trusted certificate chains that contain a large number of policy mappings, leading to excessive resource consumption. Exploitation requires an attacker to present a specially crafted, yet trusted, certificate chain which would require the attacker has already compromised a trusted certificate root. Red Hat continuously monitors certificate authorities and curates the set which is trusted by default for Red Hat products.",
          "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"
        }
      ],
      "product_status": {
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          "title": "Vulnerability summary"
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          "text": "To exploit this issue, an attacker needs access to the system and the required permissions to create a symbolic link. Additionally, the attacker must swap the target file with a symbolic link in the exact window after the `Root.Chmod` function checks its target but before acting. Due to these conditions, this flaw has been rated with a moderate severity.",
          "title": "Statement"
        },
        {
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          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2456336"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-32282",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-32282"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-32282",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-32282"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/763761",
          "url": "https://go.dev/cl/763761"
        },
        {
          "category": "external",
          "summary": "https://go.dev/issue/78293",
          "url": "https://go.dev/issue/78293"
        },
        {
          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU",
          "url": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-4864",
          "url": "https://pkg.go.dev/vuln/GO-2026-4864"
        }
      ],
      "release_date": "2026-04-08T01:06:55.953000+00:00",
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        {
          "category": "vendor_fix",
          "date": "2026-07-20T13:55:38+00:00",
          "details": "To start using the Web Terminal Operator, install the Web Terminal Operator from OpenShift OperatorHub on OpenShift Container Platform 4.17 or higher.",
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:42047"
        },
        {
          "category": "workaround",
          "details": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.",
          "product_ids": [
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:423baadb7daeaf78b5df584e7e5e8f2ad991e0db803a22ec7a90f7d468e55415_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:7319fa6637e0c4111633194a7e83d0105dda2ee161040eed6901cb7e45b6ad97_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:d32c93e5c790ad660161326837341f968ce0ed9bfd7ad2232ee27a2b56ef2526_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64"
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      "scores": [
        {
          "cvss_v3": {
            "attackComplexity": "HIGH",
            "attackVector": "LOCAL",
            "availabilityImpact": "HIGH",
            "baseScore": 7.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "HIGH",
            "privilegesRequired": "LOW",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H",
            "version": "3.1"
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            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64"
          ]
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      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "golang: internal/syscall/unix: Root.Chmod can follow symlinks out of the root"
    },
    {
      "cve": "CVE-2026-33810",
      "cwe": {
        "id": "CWE-1289",
        "name": "Improper Validation of Unsafe Equivalence in Input"
      },
      "discovery_date": "2026-04-08T02:01:09.100830+00:00",
      "flags": [
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        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2456335"
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        {
          "category": "description",
          "text": "A flaw was found in the `crypto/x509` package within Go (golang). When verifying a certificate chain, excluded DNS (Domain Name System) constraints are not correctly applied to wildcard DNS Subject Alternative Names (SANs) if the case of the SAN differs from the constraint. This oversight could allow an attacker to bypass certificate validation, potentially leading to the acceptance of a malicious certificate that should have been rejected. This issue specifically impacts the validation of trusted certificate chains.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is an Important flaw in the Go `crypto/x509` package that could allow an attacker to bypass certificate validation. The vulnerability arises from an incorrect application of excluded DNS constraints to wildcard DNS Subject Alternative Names (SANs) when their case differs from the constraint. This could lead to Red Hat products accepting malicious certificates from otherwise trusted chains, compromising the trust model.",
          "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",
          "summary": "Canonical URL",
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          "summary": "RHBZ#2456335",
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          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-33810",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-33810"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-33810",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33810"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/763763",
          "url": "https://go.dev/cl/763763"
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          "category": "external",
          "summary": "https://go.dev/issue/78332",
          "url": "https://go.dev/issue/78332"
        },
        {
          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU",
          "url": "https://groups.google.com/g/golang-announce/c/0uYbvbPZRWU"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-4866",
          "url": "https://pkg.go.dev/vuln/GO-2026-4866"
        }
      ],
      "release_date": "2026-04-08T01:06:56.546000+00:00",
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          "category": "vendor_fix",
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:42047"
        }
      ],
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        {
          "cvss_v3": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "LOW",
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:L",
            "version": "3.1"
          },
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        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "crypto/x509: golang: Go crypto/x509: Certificate validation bypass due to incorrect DNS constraint application"
    },
    {
      "cve": "CVE-2026-33811",
      "cwe": {
        "id": "CWE-1341",
        "name": "Multiple Releases of Same Resource or Handle"
      },
      "discovery_date": "2026-05-07T20:01:34.913869+00:00",
      "flags": [
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          "label": "vulnerable_code_not_present",
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      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
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        {
          "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"
        }
      ],
      "product_status": {
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      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
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        {
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-33811",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-33811"
        },
        {
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          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-33811",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-33811"
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        {
          "category": "external",
          "summary": "https://go.dev/cl/767860",
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        {
          "category": "external",
          "summary": "https://go.dev/issue/78803",
          "url": "https://go.dev/issue/78803"
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        {
          "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",
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        {
          "category": "vendor_fix",
          "date": "2026-07-20T13:55:38+00:00",
          "details": "To start using the Web Terminal Operator, install the Web Terminal Operator from OpenShift OperatorHub on OpenShift Container Platform 4.17 or higher.",
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          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:42047"
        },
        {
          "category": "workaround",
          "details": "To mitigate this issue, applications can be configured to use the pure Go DNS resolver instead of the `cgo` DNS resolver. This can be achieved by setting the `GODEBUG` environment variable to `netdns=go`. For example, to run a Go application with this mitigation: `GODEBUG=netdns=go /path/to/your/go/application`. This change may require restarting affected applications or services to take effect. Users should verify that this change does not negatively impact DNS resolution for their specific application environment.",
          "product_ids": [
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:423baadb7daeaf78b5df584e7e5e8f2ad991e0db803a22ec7a90f7d468e55415_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:7319fa6637e0c4111633194a7e83d0105dda2ee161040eed6901cb7e45b6ad97_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:d32c93e5c790ad660161326837341f968ce0ed9bfd7ad2232ee27a2b56ef2526_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64"
          ]
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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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            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:d32c93e5c790ad660161326837341f968ce0ed9bfd7ad2232ee27a2b56ef2526_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64"
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          "details": "Important"
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      "title": "net: golang: Go net package: Denial of Service via long CNAME response in LookupCNAME"
    },
    {
      "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": [
        {
          "label": "vulnerable_code_not_present",
          "product_ids": [
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            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:d32c93e5c790ad660161326837341f968ce0ed9bfd7ad2232ee27a2b56ef2526_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64"
          ]
        }
      ],
      "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"
        }
      ],
      "product_status": {
        "fixed": [
          "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:423baadb7daeaf78b5df584e7e5e8f2ad991e0db803a22ec7a90f7d468e55415_amd64"
        ],
        "known_not_affected": [
          "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:7319fa6637e0c4111633194a7e83d0105dda2ee161040eed6901cb7e45b6ad97_amd64",
          "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:d32c93e5c790ad660161326837341f968ce0ed9bfd7ad2232ee27a2b56ef2526_amd64",
          "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-39821"
        },
        {
          "category": "external",
          "summary": "RHBZ#2480756",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2480756"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-39821",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-39821"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-39821",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-39821"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/767220",
          "url": "https://go.dev/cl/767220"
        },
        {
          "category": "external",
          "summary": "https://go.dev/issue/78760",
          "url": "https://go.dev/issue/78760"
        },
        {
          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8",
          "url": "https://groups.google.com/g/golang-announce/c/iI-mYSI0lu8"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-5026",
          "url": "https://pkg.go.dev/vuln/GO-2026-5026"
        }
      ],
      "release_date": "2026-05-22T15:01:21.462000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-07-20T13:55:38+00:00",
          "details": "To start using the Web Terminal Operator, install the Web Terminal Operator from OpenShift OperatorHub on OpenShift Container Platform 4.17 or higher.",
          "product_ids": [
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:423baadb7daeaf78b5df584e7e5e8f2ad991e0db803a22ec7a90f7d468e55415_amd64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:42047"
        },
        {
          "category": "workaround",
          "details": "Upgrade to a fixed golang.org/x/net release that includes the idna correction, via updated golang or dependent package rebuilds.",
          "product_ids": [
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:423baadb7daeaf78b5df584e7e5e8f2ad991e0db803a22ec7a90f7d468e55415_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:7319fa6637e0c4111633194a7e83d0105dda2ee161040eed6901cb7e45b6ad97_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:d32c93e5c790ad660161326837341f968ce0ed9bfd7ad2232ee27a2b56ef2526_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64"
          ]
        }
      ],
      "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"
          },
          "products": [
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:423baadb7daeaf78b5df584e7e5e8f2ad991e0db803a22ec7a90f7d468e55415_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:7319fa6637e0c4111633194a7e83d0105dda2ee161040eed6901cb7e45b6ad97_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:d32c93e5c790ad660161326837341f968ce0ed9bfd7ad2232ee27a2b56ef2526_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64"
          ]
        }
      ],
      "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-2026-42504",
      "cwe": {
        "id": "CWE-1050",
        "name": "Excessive Platform Resource Consumption within a Loop"
      },
      "discovery_date": "2026-06-02T23:01:00.320527+00:00",
      "flags": [
        {
          "label": "vulnerable_code_not_present",
          "product_ids": [
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:7319fa6637e0c4111633194a7e83d0105dda2ee161040eed6901cb7e45b6ad97_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:d32c93e5c790ad660161326837341f968ce0ed9bfd7ad2232ee27a2b56ef2526_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64"
          ]
        }
      ],
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2484204"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in the Golang MIME (Multipurpose Internet Mail Extensions) package. A remote attacker could exploit this vulnerability by sending a maliciously-crafted MIME header containing many invalid encoded-words. This could lead to excessive CPU consumption, resulting in a Denial of Service (DoS) for the affected system.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "mime: golang: Golang MIME: Denial of Service via maliciously-crafted MIME header",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This is rated as an Important severity flaw. A remote attacker could trigger a Denial of Service by sending a crafted MIME header with numerous invalid encoded-words to an application utilizing the affected Golang MIME package. This could lead to excessive CPU consumption on the system processing the malformed header, 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"
        }
      ],
      "product_status": {
        "fixed": [
          "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:423baadb7daeaf78b5df584e7e5e8f2ad991e0db803a22ec7a90f7d468e55415_amd64"
        ],
        "known_not_affected": [
          "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:7319fa6637e0c4111633194a7e83d0105dda2ee161040eed6901cb7e45b6ad97_amd64",
          "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:d32c93e5c790ad660161326837341f968ce0ed9bfd7ad2232ee27a2b56ef2526_amd64",
          "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-42504"
        },
        {
          "category": "external",
          "summary": "RHBZ#2484204",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2484204"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-42504",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-42504"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-42504",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42504"
        },
        {
          "category": "external",
          "summary": "https://go.dev/cl/774481",
          "url": "https://go.dev/cl/774481"
        },
        {
          "category": "external",
          "summary": "https://go.dev/issue/79217",
          "url": "https://go.dev/issue/79217"
        },
        {
          "category": "external",
          "summary": "https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw",
          "url": "https://groups.google.com/g/golang-announce/c/tKs3rmcBcKw"
        },
        {
          "category": "external",
          "summary": "https://pkg.go.dev/vuln/GO-2026-5038",
          "url": "https://pkg.go.dev/vuln/GO-2026-5038"
        }
      ],
      "release_date": "2026-06-02T22:01:37.219000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-07-20T13:55:38+00:00",
          "details": "To start using the Web Terminal Operator, install the Web Terminal Operator from OpenShift OperatorHub on OpenShift Container Platform 4.17 or higher.",
          "product_ids": [
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:423baadb7daeaf78b5df584e7e5e8f2ad991e0db803a22ec7a90f7d468e55415_amd64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:42047"
        },
        {
          "category": "workaround",
          "details": "To mitigate this issue, restrict network access to services that process MIME headers from untrusted sources. Implement input validation and sanitization for all incoming data, especially MIME headers, to prevent maliciously crafted content from being processed by applications utilizing the vulnerable Golang MIME package.",
          "product_ids": [
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:423baadb7daeaf78b5df584e7e5e8f2ad991e0db803a22ec7a90f7d468e55415_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:7319fa6637e0c4111633194a7e83d0105dda2ee161040eed6901cb7e45b6ad97_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:d32c93e5c790ad660161326837341f968ce0ed9bfd7ad2232ee27a2b56ef2526_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64"
          ]
        }
      ],
      "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"
          },
          "products": [
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-exec-rhel9@sha256:423baadb7daeaf78b5df584e7e5e8f2ad991e0db803a22ec7a90f7d468e55415_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-operator-bundle@sha256:7319fa6637e0c4111633194a7e83d0105dda2ee161040eed6901cb7e45b6ad97_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-rhel9-operator@sha256:d32c93e5c790ad660161326837341f968ce0ed9bfd7ad2232ee27a2b56ef2526_amd64",
            "Red Hat Web Terminal 1.12:registry.redhat.io/web-terminal/web-terminal-tooling-rhel9@sha256:43afcf8bfefccdb35c95d4e875fd610e56e6aba93947c6203fcade80e494e7d8_amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "mime: golang: Golang MIME: Denial of Service via maliciously-crafted MIME header"
    }
  ]
}



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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.

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Detection rules are retrieved from Rulezet.

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