{
  "cveId": "CVE-2026-48525",
  "url": "https://patchblox.com/security/cve/CVE-2026-48525",
  "summary": "CVE-2026-48525 is fixed in 4 products on 1 platform, first by python3-jwt 2.7.0-1ubuntu0.2, 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. From 2.8.0 to 2.12.1, when verifying detached JWS tokens using the unencoded-payload option (\u0022b64\u0022: false, RFC 7797), PyJWT performs Base64URL decoding of the compact-serialization payload segment before enforcing the detached-payload rules. For b64=false, PyJWT later discards that decoded payload and replaces it with the caller-provided detached_payload. In practice, this turns the middle segment into an attacker-controlled \u201Cwork amplifier\u201D: a remote client can supply an arbitrarily large Base64URL payload segment that forces CPU work \u002B memory allocations even if the signature is invalid. This creates an unauthenticated DoS vector against any endpoint that verifies detached JWS using PyJWT. This vulnerability is fixed in 2.13.0.",
  "published": "2026-05-28T09:16:00Z",
  "severity": "Medium",
  "cvss": 5.3,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L",
  "epss": 0.0037,
  "epssPercentile": 0.31154,
  "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-2026-48525",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-48525",
      "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 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": "2026-11-08T13:06:02Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}