RHSA-2026:37278

Vulnerability from csaf_redhat - Published: 2026-07-09 12:10 - Updated: 2026-08-10 14:57
Summary
Red Hat Security Advisory: RHTAS 1.4.2 - Tech Preview Release Of the Go based Model Transparency CLI
Severity
Important
Notes
Topic: The Tech Preview release of the Go based RHTAS Model Transparency CLI image. 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 Go based RHTAS Model Transparency CLI image can be used to sign and verify AI/ML workloads
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-2026-39828

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
Product Identifier Version Remediation
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:9c1430c79d63007b5a3d86cfa613da19d81d1874b15b05df001f026efea7a2cd_arm64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:a36ec195ebd459a5874dadf181342908c0fbd2b3fadc05622125744e686c88b4_s390x —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:b2f4d793fb7ea549ec05afd97cf3bdea964ebd33a08a862486392953cfe64f8f_ppc64le —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:fa965992a2480108fbd659278832e1dfcbdd2f4d4dcc0f5e8f5654ffdda083ef_amd64 —
Vendor Fix fix
Workaround
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
Product Identifier Version Remediation
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:9c1430c79d63007b5a3d86cfa613da19d81d1874b15b05df001f026efea7a2cd_arm64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:a36ec195ebd459a5874dadf181342908c0fbd2b3fadc05622125744e686c88b4_s390x —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:b2f4d793fb7ea549ec05afd97cf3bdea964ebd33a08a862486392953cfe64f8f_ppc64le —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:fa965992a2480108fbd659278832e1dfcbdd2f4d4dcc0f5e8f5654ffdda083ef_amd64 —
Vendor Fix fix
Workaround
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
Product Identifier Version Remediation
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:9c1430c79d63007b5a3d86cfa613da19d81d1874b15b05df001f026efea7a2cd_arm64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:a36ec195ebd459a5874dadf181342908c0fbd2b3fadc05622125744e686c88b4_s390x —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:b2f4d793fb7ea549ec05afd97cf3bdea964ebd33a08a862486392953cfe64f8f_ppc64le —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:fa965992a2480108fbd659278832e1dfcbdd2f4d4dcc0f5e8f5654ffdda083ef_amd64 —
Vendor Fix fix
Workaround
Threats
Impact Important
References
URL Category
https://access.redhat.com/errata/RHSA-2026:37278 self
https://access.redhat.com/documentation/en-us/red… 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/updates/classi… external
https://security.access.redhat.com/data/csaf/v2/a… self
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
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  "vulnerabilities": [
    {
      "cve": "CVE-2026-39828",
      "cwe": {
        "id": "CWE-281",
        "name": "Improper Preservation of Permissions"
      },
      "discovery_date": "2026-05-22T04:01:46.775641+00:00",
      "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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      "product_status": {
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          "title": "Vulnerability description"
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        },
        {
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          "title": "Statement"
        },
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            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:a36ec195ebd459a5874dadf181342908c0fbd2b3fadc05622125744e686c88b4_s390x",
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:b2f4d793fb7ea549ec05afd97cf3bdea964ebd33a08a862486392953cfe64f8f_ppc64le",
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:fa965992a2480108fbd659278832e1dfcbdd2f4d4dcc0f5e8f5654ffdda083ef_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 Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:9c1430c79d63007b5a3d86cfa613da19d81d1874b15b05df001f026efea7a2cd_arm64",
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:a36ec195ebd459a5874dadf181342908c0fbd2b3fadc05622125744e686c88b4_s390x",
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:b2f4d793fb7ea549ec05afd97cf3bdea964ebd33a08a862486392953cfe64f8f_ppc64le",
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/model-transparency-cli-rhel9@sha256:fa965992a2480108fbd659278832e1dfcbdd2f4d4dcc0f5e8f5654ffdda083ef_amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "golang.org/x/crypto/ssh: golang.org/x/crypto/ssh: Denial of Service via resource leak from unsolicited SSH responses"
    }
  ]
}



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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.