{
  "cveId": "CVE-2026-49852",
  "url": "https://patchblox.com/security/cve/CVE-2026-49852",
  "summary": "CVE-2026-49852 is fixed in 2 products on 1 platform, first by OPENSUSE-SU-2026:21263-1, released July 6, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "joserfc: joserfc is a Python library that provides an implementation of several JSON Object Signing and Encryption (JOSE) stan...",
  "description": "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.",
  "published": "2026-07-06T09:01:24Z",
  "severity": "",
  "epss": 0.00171,
  "epssPercentile": 0.06526,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "joserfc",
      "release": "Debian 14",
      "fixedVersion": "1.6.8-1",
      "fix": "DEBIAN-CVE-2026-49852",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-49852",
      "released": "2026-07-19T12:50:38Z"
    },
    {
      "platform": "linux",
      "product": "python-joserfc",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "1.1.0-bp160.3.1",
      "fix": "OPENSUSE-SU-2026:21263-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21263-1",
      "released": "2026-07-06T09:01:24Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}