RHSA-2026:83603

Vulnerability from csaf_redhat - Published: 2026-10-15 14:32 - Updated: 2026-11-03 19:16
Summary
Red Hat Security Advisory: RHTAS 1.4.4 - Red Hat Trusted Artifact Signer Release
Severity
Important
Notes
Topic: The 1.4.4 release of Red Hat Trusted Artifact Signer OpenShift Operator. 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 Operator can be used with OpenShift Container Platform 4.17, 4.18, 4.19, 4.20, 4.21, 4.22, and 5.0
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-2026-18140

A flaw was found in aws-smithy-json. This vulnerability allows a remote, unauthenticated attacker to cause a denial of service (DoS) in smithy-rs generated servers. By sending a small HTTP request containing deeply nested JSON, the attacker can trigger uncontrolled recursion in the aws-smithy-json runtime, leading to stack exhaustion and a process abort. This can make the affected server unavailable to legitimate users.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-776 - Improper Restriction of Recursive Entity References in DTDs
Affected products
Product Identifier Version Remediation
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuffer-rhel9@sha256:6171943a8081a69eafc494b539b51f173e5ee59b2b350cc149ae43c0d96a3c96_amd64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:571141fdcf8373e9f7e8011fe4e531ede17480002c395b2421191d037b4bdae2_ppc64le —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:df6b6e032f50b72f354c5c31c490a68cdf8ddb177641deee9e400b46800c1250_amd64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:e0652f98386f3979bf1ce31423b696767db5d2b824c9a9848b4cf974a754c089_arm64 —
Vendor Fix fix
Workaround
Unresolved product id: Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:ffc1238769e637d90871551ffc0eafb85e3ab4bdea4b38d6c71f288222b27f16_s390x —
Vendor Fix fix
Workaround
Threats
Impact Important
CVE-2026-93599

A flaw was found in rustls-webpki. A remote attacker, by influencing an application to parse a specially crafted Certificate Revocation List (CRL) that contains an empty `onlySomeReasons` value in its `issuingDistributionPoint` extension, could trigger a panic. This vulnerability leads to a denial of service (DoS) in applications that explicitly enable CRL revocation checking.

7.5 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CWE-125 - Out-of-bounds Read
Affected products
Fixed 5 products, the same list as for CVE-2026-18140
Threats
Impact Important
References
To clipboard 

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      "cwe": {
        "id": "CWE-776",
        "name": "Improper Restriction of Recursive Entity References in DTDs"
      },
      "discovery_date": "2026-07-30T19:01:57.203369+00:00",
      "ids": [
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          "text": "2509566"
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          "text": "A flaw was found in aws-smithy-json. This vulnerability allows a remote, unauthenticated attacker to cause a denial of service (DoS) in smithy-rs generated servers. By sending a small HTTP request containing deeply nested JSON, the attacker can trigger uncontrolled recursion in the aws-smithy-json runtime, leading to stack exhaustion and a process abort. This can make the affected server unavailable to legitimate users.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "aws-smithy-json: aws-smithy-json: Denial of Service via uncontrolled recursion with deeply nested JSON",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This flaw in the `aws-smithy-json` runtime crate allows a remote unauthenticated attacker to trigger a denial of service by sending a crafted HTTP request with deeply nested JSON. Red Hat products utilizing `smithy-rs` generated servers, such as components in Red Hat Enterprise Linux and Red Hat Trusted Artifact Signer, are susceptible to service disruption if exposed to untrusted networks.",
          "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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          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-18140"
        },
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          "summary": "RHBZ#2509566",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2509566"
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          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-18140",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-18140"
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          "url": "https://crates.io/crates/aws-smithy-json/0.62.7"
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          "summary": "https://github.com/smithy-lang/smithy-rs/security/advisories/GHSA-8ffr-xgwf-xj56",
          "url": "https://github.com/smithy-lang/smithy-rs/security/advisories/GHSA-8ffr-xgwf-xj56"
        }
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      "release_date": "2026-07-30T18:34:04.099000+00:00",
      "remediations": [
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          "category": "vendor_fix",
          "date": "2026-10-15T14:32:46+00:00",
          "details": "Red Hat Trusted Artifact Signer simplifies cryptographic signing and verifying of software artifacts such as container images, binaries and source code changes. It is a self-managed on-premise deployment of the Sigstore project available at https://sigstore.dev\n\nPlatform Engineers, Software Developers and Security Professionals may use RHTAS to ensure the integrity, transparency and assurance of their organization\u0027s software supply chain.\n\nFor details on using the operator, 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": [
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuffer-rhel9@sha256:6171943a8081a69eafc494b539b51f173e5ee59b2b350cc149ae43c0d96a3c96_amd64",
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:571141fdcf8373e9f7e8011fe4e531ede17480002c395b2421191d037b4bdae2_ppc64le",
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:df6b6e032f50b72f354c5c31c490a68cdf8ddb177641deee9e400b46800c1250_amd64",
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:e0652f98386f3979bf1ce31423b696767db5d2b824c9a9848b4cf974a754c089_arm64",
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:ffc1238769e637d90871551ffc0eafb85e3ab4bdea4b38d6c71f288222b27f16_s390x"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:83603"
        },
        {
          "category": "workaround",
          "details": "Restrict network access to services that process JSON input using the `aws-smithy-json` runtime. Configure firewalls to limit incoming connections to trusted sources, thereby reducing the exposure to remote unauthenticated denial of service attacks. If the service is reloaded or restarted, ensure firewall rules persist.",
          "product_ids": [
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuffer-rhel9@sha256:6171943a8081a69eafc494b539b51f173e5ee59b2b350cc149ae43c0d96a3c96_amd64",
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:571141fdcf8373e9f7e8011fe4e531ede17480002c395b2421191d037b4bdae2_ppc64le",
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:df6b6e032f50b72f354c5c31c490a68cdf8ddb177641deee9e400b46800c1250_amd64",
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:e0652f98386f3979bf1ce31423b696767db5d2b824c9a9848b4cf974a754c089_arm64",
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:ffc1238769e637d90871551ffc0eafb85e3ab4bdea4b38d6c71f288222b27f16_s390x"
          ]
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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"
          },
          "products": [
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            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:571141fdcf8373e9f7e8011fe4e531ede17480002c395b2421191d037b4bdae2_ppc64le",
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:df6b6e032f50b72f354c5c31c490a68cdf8ddb177641deee9e400b46800c1250_amd64",
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:e0652f98386f3979bf1ce31423b696767db5d2b824c9a9848b4cf974a754c089_arm64",
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:ffc1238769e637d90871551ffc0eafb85e3ab4bdea4b38d6c71f288222b27f16_s390x"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "aws-smithy-json: aws-smithy-json: Denial of Service via uncontrolled recursion with deeply nested JSON"
    },
    {
      "cve": "CVE-2026-93599",
      "cwe": {
        "id": "CWE-125",
        "name": "Out-of-bounds Read"
      },
      "discovery_date": "2026-09-22T18:32:06.471964+00:00",
      "ids": [
        {
          "system_name": "Red Hat Bugzilla ID",
          "text": "2538431"
        }
      ],
      "notes": [
        {
          "category": "description",
          "text": "A flaw was found in rustls-webpki. A remote attacker, by influencing an application to parse a specially crafted Certificate Revocation List (CRL) that contains an empty `onlySomeReasons` value in its `issuingDistributionPoint` extension, could trigger a panic. This vulnerability leads to a denial of service (DoS) in applications that explicitly enable CRL revocation checking.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "rustls-webpki: rustls-webpki: Denial of Service via crafted Certificate Revocation List",
          "title": "Vulnerability summary"
        },
        {
          "category": "other",
          "text": "This vulnerability is rated as Important because an unauthenticated remote attacker can cause an immediate denial of service by triggering an unhandled panic in network-facing services. Exploitation requires the consuming software to explicitly enable Certificate Revocation List (CRL) validation, a capability that is disabled by default in standard rustls configurations. Applications and services that actively ingest revocation lists from untrusted endpoints face service termination, whereas environments utilizing default certificate verification workflows remain unaffected.",
          "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": [
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          "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:571141fdcf8373e9f7e8011fe4e531ede17480002c395b2421191d037b4bdae2_ppc64le",
          "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:df6b6e032f50b72f354c5c31c490a68cdf8ddb177641deee9e400b46800c1250_amd64",
          "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:e0652f98386f3979bf1ce31423b696767db5d2b824c9a9848b4cf974a754c089_arm64",
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        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-93599"
        },
        {
          "category": "external",
          "summary": "RHBZ#2538431",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2538431"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-93599",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-93599"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-93599",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-93599"
        },
        {
          "category": "external",
          "summary": "https://github.com/rustls/webpki/security/advisories/GHSA-82j2-j2ch-gfr8",
          "url": "https://github.com/rustls/webpki/security/advisories/GHSA-82j2-j2ch-gfr8"
        },
        {
          "category": "external",
          "summary": "https://www.vulncheck.com/advisories/rustls-webpki-before-0.103.13-panic-via-empty-bit-string",
          "url": "https://www.vulncheck.com/advisories/rustls-webpki-before-0.103.13-panic-via-empty-bit-string"
        }
      ],
      "release_date": "2026-09-18T13:20:10.258000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-10-15T14:32:46+00:00",
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            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:e0652f98386f3979bf1ce31423b696767db5d2b824c9a9848b4cf974a754c089_arm64",
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:ffc1238769e637d90871551ffc0eafb85e3ab4bdea4b38d6c71f288222b27f16_s390x"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:83603"
        }
      ],
      "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 Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:571141fdcf8373e9f7e8011fe4e531ede17480002c395b2421191d037b4bdae2_ppc64le",
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:df6b6e032f50b72f354c5c31c490a68cdf8ddb177641deee9e400b46800c1250_amd64",
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:e0652f98386f3979bf1ce31423b696767db5d2b824c9a9848b4cf974a754c089_arm64",
            "Red Hat Trusted Artifact Signer 1.4:registry.redhat.io/rhtas/tuftool-rhel9@sha256:ffc1238769e637d90871551ffc0eafb85e3ab4bdea4b38d6c71f288222b27f16_s390x"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "rustls-webpki: rustls-webpki: Denial of Service via crafted Certificate Revocation List"
    }
  ]
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
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