{
  "cveId": "CVE-2026-102270",
  "url": "https://patchblox.com/security/cve/CVE-2026-102270",
  "summary": "CVE-2026-102270 is fixed in 2 products on 1 platform, first by DEBIAN-CVE-2026-102270, released October 4, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "PyJWT: ReDoS vulnerability when calling the \u0060is_pem_format\u0060 function.",
  "description": "PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, PyJWT is_pem_format is affected because lazy PEM regular expression backtracks extensively. This occurs when a certificate-like input contains repeated BEGIN markers without a matching END marker. As a result, is_pem_format performs unbounded backtracking while searching for a PEM end marker. Consequently, an attacker can cause intensive CPU consumption. This issue is fixed in version 2.14.0.",
  "published": "2026-09-28T21:17:14Z",
  "severity": "Moderate",
  "cvss": 4.9,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H",
  "cwe": "Inefficient Regular Expression Complexity",
  "epss": 0.00246,
  "epssPercentile": 0.15873,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "vendorAdvisory": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-102270",
  "fixes": [
    {
      "platform": "linux",
      "product": "pyjwt",
      "release": "Debian 14",
      "fixedVersion": "2.14.0-1",
      "fix": "DEBIAN-CVE-2026-102270",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-102270",
      "released": "2026-10-04T21:29:23Z"
    },
    {
      "platform": "linux",
      "product": "python-PyJWT",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "2.12.1-160000.3.1",
      "fix": "OPENSUSE-SU-2026:22074-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-22074-1",
      "released": "2026-11-07T00:47:19Z"
    },
    {
      "platform": "linux",
      "product": "python-PyJWT",
      "release": "sles 15.6",
      "fixedVersion": "2.8.0-150400.8.20.1",
      "fix": "SUSE-SU-2026:5064-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5064-1",
      "released": "2026-11-07T00:42:08Z"
    },
    {
      "platform": "linux",
      "product": "python-PyJWT",
      "release": "sles 15.7",
      "fixedVersion": "2.8.0-150400.8.20.1",
      "fix": "SUSE-SU-2026:5064-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-5064-1",
      "released": "2026-11-07T00:42:08Z"
    },
    {
      "platform": "linux",
      "product": "python-PyJWT",
      "release": "sles 16.0",
      "fixedVersion": "2.12.1-160000.3.1",
      "fix": "SUSE-SU-2026:24219-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-24219-1",
      "released": "2026-11-07T00:44:01Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-10T01:44:33Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}