{
  "cveId": "CVE-2026-48522",
  "url": "https://patchblox.com/security/cve/CVE-2026-48522",
  "summary": "CVE-2026-48522 is fixed in 4 products on 1 platform, first by python3-jwt 2.3.0-1ubuntu0.4, released May 28, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "python3-jwt: PyJWT is a JSON Web Token implementation in Python",
  "description": "PyJWT is a JSON Web Token implementation in Python. Prior to 2.13.0, PyJWKClient passes its uri argument directly to urllib.request.urlopen() which uses Python stdlib\u0027s default OpenerDirector registering HTTPHandler, HTTPSHandler, FTPHandler, FileHandler, and DataHandler. There is currently no documented option to restrict which schemes PyJWKClient will fetch. If an application\u0027s jku URL ingestion path accepts attacker-influenced URLs (e.g., from JWT header, configuration file, OAuth flow parameter), the attacker can cause PyJWKClient to read arbitrary local files via file:// (SSRF on local filesystem), cause PyJWKClient to attempt FTP / data-URI fetches (broader SSRF surface), or forge tokens that PyJWT verifies as valid. The library does not directly return non-HTTP(S) URI contents to the attacker; the chained \u0022plant a JWKS to forge tokens\u0022 scenario described in the original report requires additional application-layer flaws (attacker write access to a filesystem path, untrusted jku derivation) that this fix does not address. This vulnerability is fixed in 2.13.0.",
  "published": "2026-05-28T09:16:00Z",
  "severity": "Medium",
  "cvss": 4.2,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N",
  "epss": 0.00222,
  "epssPercentile": 0.12831,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "pyjwt",
      "release": "Debian 14",
      "fixedVersion": "2.13.0-1",
      "fix": "DEBIAN-CVE-2026-48522",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-48522",
      "released": "2026-05-28T16:16:29Z"
    },
    {
      "platform": "linux",
      "product": "python-PyJWT",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "2.12.1-160000.2.1",
      "fix": "OPENSUSE-SU-2026:21095-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-21095-1",
      "released": "2026-06-19T05:43:05Z"
    },
    {
      "platform": "linux",
      "product": "python-PyJWT",
      "release": "sles 15.6",
      "fixedVersion": "2.4.0-150200.3.14.1",
      "fix": "SUSE-SU-2026:2627-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-2627-1",
      "released": "2026-06-25T08:13:14Z"
    },
    {
      "platform": "linux",
      "product": "python-PyJWT",
      "release": "sles 15.7",
      "fixedVersion": "2.4.0-150200.3.14.1",
      "fix": "SUSE-SU-2026:2627-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-2627-1",
      "released": "2026-06-25T08:13:14Z"
    },
    {
      "platform": "linux",
      "product": "python-PyJWT",
      "release": "sles 16.0",
      "fixedVersion": "2.12.1-160000.2.1",
      "fix": "SUSE-SU-2026:22170-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-22170-1",
      "released": "2026-06-19T05:44:26Z"
    },
    {
      "platform": "linux",
      "product": "python3-jwt",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "2.3.0-1ubuntu0.4",
      "fix": "python3-jwt 2.3.0-1ubuntu0.4",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-python3-jwt-2.3.0-1ubuntu0.4",
      "released": "2026-05-28T09:16:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-jwt",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "2.7.0-1ubuntu0.2",
      "fix": "python3-jwt 2.7.0-1ubuntu0.2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-python3-jwt-2.7.0-1ubuntu0.2",
      "released": "2026-05-28T09:16:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-jwt",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "2.10.1-4ubuntu1.1",
      "fix": "python3-jwt 2.10.1-4ubuntu1.1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-python3-jwt-2.10.1-4ubuntu1.1",
      "released": "2026-05-28T09:16:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-jwt",
      "release": "amzn 2023",
      "fixedVersion": "2.4.0-1.amzn2023.0.5",
      "fix": "ALAS2023-2026-2051",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2051",
      "released": "2026-08-17T09:00:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-jwt\u002Bcrypto",
      "release": "amzn 2023",
      "fixedVersion": "2.4.0-1.amzn2023.0.5",
      "fix": "ALAS2023-2026-2051",
      "url": "https://patchblox.com/security/fix/linux/alas2023-2026-2051",
      "released": "2026-08-17T09:00:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-07T18:46:35Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}