RHSA-2026:2126

Vulnerability from csaf_redhat - Published: 2026-02-05 14:55 - Updated: 2026-02-12 20:51
Summary
Red Hat Security Advisory: RHTAS 1.3.2 - Red Hat Trusted Artifact Signer Release

Notes

Topic
The 1.3.2 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/1.3
Details
The RHTAS Operator can be used with OpenShift Container Platform 4.16, 4.17, 4.18, 4.19, and 4.20
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.
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        {
          "category": "description",
          "text": "urllib3 is an HTTP client library for Python. urllib3\u0027s streaming API is designed for the efficient handling of large HTTP responses by reading the content in chunks, rather than loading the entire response body into memory at once. urllib3 can perform decoding or decompression based on the HTTP `Content-Encoding` header (e.g., `gzip`, `deflate`, `br`, or `zstd`). When using the streaming API, the library decompresses only the necessary bytes, enabling partial content consumption. Starting in version 1.22 and prior to version 2.6.3, for HTTP redirect responses, the library would read the entire response body to drain the connection and decompress the content unnecessarily. This decompression occurred even before any read methods were called, and configured read limits did not restrict the amount of decompressed data. As a result, there was no safeguard against decompression bombs. A malicious server could exploit this to trigger excessive resource consumption on the client. Applications and libraries are affected when they stream content from untrusted sources by setting `preload_content=False` when they do not disable redirects. Users should upgrade to at least urllib3 v2.6.3, in which the library does not decode content of redirect responses when `preload_content=False`. If upgrading is not immediately possible, disable redirects by setting `redirect=False` for requests to untrusted source.",
          "title": "Vulnerability description"
        },
        {
          "category": "summary",
          "text": "urllib3: urllib3 vulnerable to decompression-bomb safeguard bypass when following HTTP redirects (streaming API)",
          "title": "Vulnerability summary"
        },
        {
          "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 Trusted Artifact Signer 1.3:registry.redhat.io/rhtas/tuffer-rhel9@sha256:89c686659b2276825a7109717ec3326b7a2054d48dae50ae41407744ae26d1aa_amd64",
          "Red Hat Trusted Artifact Signer 1.3:registry.redhat.io/rhtas/tuftool-rhel9@sha256:be5fa59dc9427896d01b73b547f6ab6cd3d4726e8d8bc02e997addde392861ef_amd64"
        ]
      },
      "references": [
        {
          "category": "self",
          "summary": "Canonical URL",
          "url": "https://access.redhat.com/security/cve/CVE-2026-21441"
        },
        {
          "category": "external",
          "summary": "RHBZ#2427726",
          "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2427726"
        },
        {
          "category": "external",
          "summary": "https://www.cve.org/CVERecord?id=CVE-2026-21441",
          "url": "https://www.cve.org/CVERecord?id=CVE-2026-21441"
        },
        {
          "category": "external",
          "summary": "https://nvd.nist.gov/vuln/detail/CVE-2026-21441",
          "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-21441"
        },
        {
          "category": "external",
          "summary": "https://github.com/urllib3/urllib3/commit/8864ac407bba8607950025e0979c4c69bc7abc7b",
          "url": "https://github.com/urllib3/urllib3/commit/8864ac407bba8607950025e0979c4c69bc7abc7b"
        },
        {
          "category": "external",
          "summary": "https://github.com/urllib3/urllib3/security/advisories/GHSA-38jv-5279-wg99",
          "url": "https://github.com/urllib3/urllib3/security/advisories/GHSA-38jv-5279-wg99"
        }
      ],
      "release_date": "2026-01-07T22:09:01.936000+00:00",
      "remediations": [
        {
          "category": "vendor_fix",
          "date": "2026-02-05T14:55:08+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/1.3\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/1.3/html-single/release_notes/index",
          "product_ids": [
            "Red Hat Trusted Artifact Signer 1.3:registry.redhat.io/rhtas/tuffer-rhel9@sha256:89c686659b2276825a7109717ec3326b7a2054d48dae50ae41407744ae26d1aa_amd64",
            "Red Hat Trusted Artifact Signer 1.3:registry.redhat.io/rhtas/tuftool-rhel9@sha256:be5fa59dc9427896d01b73b547f6ab6cd3d4726e8d8bc02e997addde392861ef_amd64"
          ],
          "restart_required": {
            "category": "none"
          },
          "url": "https://access.redhat.com/errata/RHSA-2026:2126"
        }
      ],
      "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 1.3:registry.redhat.io/rhtas/tuffer-rhel9@sha256:89c686659b2276825a7109717ec3326b7a2054d48dae50ae41407744ae26d1aa_amd64",
            "Red Hat Trusted Artifact Signer 1.3:registry.redhat.io/rhtas/tuftool-rhel9@sha256:be5fa59dc9427896d01b73b547f6ab6cd3d4726e8d8bc02e997addde392861ef_amd64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Important"
        }
      ],
      "title": "urllib3: urllib3 vulnerable to decompression-bomb safeguard bypass when following HTTP redirects (streaming API)"
    }
  ]
}


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Taxonomy of the tags.




Sightings

Author Source Type Date

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.