OPENSUSE-SU-2026:21263-1

Vulnerability from csaf_opensuse - Published: 2026-07-06 09:01 - Updated: 2026-09-17 17:38
Summary
Security update for python-joserfc
Severity
Moderate
Notes
Title of the patch: Security update for python-joserfc
Description of the patch: This update for python-joserfc fixes the following issues: Changes in python-joserfc: - CVE-2026-49852: HS256/HS384/HS512 verify accepts empty/nil HMAC key (bsc#1270234)
Patchnames: openSUSE-Leap-16.0-packagehub-392
Terms of use: CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).
Affected products
Product Identifier Version Remediation
Unresolved product id: openSUSE Leap 16.0:python313-joserfc-0:1.1.0-bp160.3.1.noarch —
Vendor Fix
Threats
Impact moderate

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    "csaf_version": "2.0",
    "distribution": {
      "text": "Copyright 2024 SUSE LLC. All rights reserved.",
      "tlp": {
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        "text": "This update for python-joserfc fixes the following issues:\n\nChanges in python-joserfc:\n\n- CVE-2026-49852: HS256/HS384/HS512 verify accepts empty/nil HMAC key (bsc#1270234)\n",
        "title": "Description of the patch"
      },
      {
        "category": "details",
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        "title": "Patchnames"
      },
      {
        "category": "legal_disclaimer",
        "text": "CSAF 2.0 data is provided by SUSE under the Creative Commons License 4.0 with Attribution (CC-BY-4.0).",
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    "publisher": {
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        "summary": "SUSE ratings",
        "url": "https://www.suse.com/support/security/rating/"
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      {
        "category": "self",
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    "title": "Security update for python-joserfc",
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      "revision_history": [
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          "date": "2026-07-06T09:01:24Z",
          "number": "1",
          "summary": "Current version"
        },
        {
          "date": "2026-09-16T20:41:20Z",
          "number": "2",
          "summary": "unknown changes"
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          "date": "2026-09-16T21:43:09Z",
          "number": "3",
          "summary": "unknown changes"
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        {
          "date": "2026-09-17T17:38:07Z",
          "number": "4",
          "summary": "unknown changes"
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      "status": "final",
      "version": "4"
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  },
  "product_tree": {
    "branches": [
      {
        "branches": [
          {
            "branches": [
              {
                "category": "product_version",
                "name": "python313-joserfc-0:1.1.0-bp160.3.1.noarch",
                "product": {
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  "vulnerabilities": [
    {
      "cve": "CVE-2026-49852",
      "ids": [
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          "text": "https://www.suse.com/security/cve/CVE-2026-49852"
        }
      ],
      "notes": [
        {
          "category": "general",
          "text": "joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) standards. Prior to 1.6.8, joserfc.jwt.decode accepts attacker-forged HMAC-signed tokens when the caller-supplied verification key is the empty string or None, because HMACAlgorithm.sign and HMACAlgorithm.verify in src/joserfc/_rfc7518/jws_algs.py pass the output of OctKey.get_op_key(...) to hmac.new(...) and OctKey.import_key in src/joserfc/_rfc7518/oct_key.py only emits a SecurityWarning for keys shorter than 14 bytes without rejecting zero-length input. This issue is fixed in version 1.6.8.",
          "title": "CVE description"
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          "summary": "SUSE Bug 1270234 for CVE-2026-49852",
          "url": "https://bugzilla.suse.com/1270234"
        }
      ],
      "remediations": [
        {
          "category": "vendor_fix",
          "details": "To install this SUSE Security Update use the SUSE recommended installation methods like YaST online_update or \"zypper patch\".\n",
          "product_ids": [
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      ],
      "threats": [
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          "category": "impact",
          "date": "2026-07-06T09:01:24Z",
          "details": "moderate"
        }
      ],
      "title": "CVE-2026-49852"
    }
  ]
}



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