{
  "cveId": "CVE-2026-28490",
  "url": "https://patchblox.com/security/cve/CVE-2026-28490",
  "summary": "CVE-2026-28490 is fixed in 3 products on 1 platform, first by python3-authlib 0.15.5-1ubuntu0.1~esm2, released March 16, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "python-authlib: Authlib is a Python library which builds OAuth and OpenID Connect servers",
  "description": "Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.9, a cryptographic padding oracle vulnerability was identified in the Authlib Python library concerning the implementation of the JSON Web Encryption (JWE) RSA1_5 key management algorithm. Authlib registers RSA1_5 in its default algorithm registry without requiring explicit opt-in, and actively destroys the constant-time Bleichenbacher mitigation that the underlying cryptography library implements correctly. This issue has been patched in version 1.6.9.",
  "published": "2026-03-16T11:16:00Z",
  "severity": "medium",
  "cvss": 6.5,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:L/A:N",
  "epss": 0.00144,
  "epssPercentile": 0.03722,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "python-Authlib",
      "release": "opensuse-leap 15.6",
      "fixedVersion": "1.3.1-150600.3.17.1",
      "fix": "SUSE-SU-2026:0975-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-0975-1",
      "released": "2026-03-23T16:34:37Z"
    },
    {
      "platform": "linux",
      "product": "python-Authlib",
      "release": "opensuse-leap 16.0",
      "fixedVersion": "1.5.2-bp160.3.1",
      "fix": "OPENSUSE-SU-2026:20392-1",
      "url": "https://patchblox.com/security/fix/linux/opensuse-su-2026-20392-1",
      "released": "2026-03-18T17:30:06Z"
    },
    {
      "platform": "linux",
      "product": "python-Authlib",
      "release": "sles 15.6",
      "fixedVersion": "1.3.1-150600.3.17.1",
      "fix": "SUSE-SU-2026:0975-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-0975-1",
      "released": "2026-03-23T16:34:37Z"
    },
    {
      "platform": "linux",
      "product": "python-Authlib",
      "release": "sles 15.7",
      "fixedVersion": "1.3.1-150600.3.17.1",
      "fix": "SUSE-SU-2026:0975-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-0975-1",
      "released": "2026-03-23T16:34:37Z"
    },
    {
      "platform": "linux",
      "product": "python-authlib",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1.2.0-1\u002Bdeb12u2",
      "fix": "DEBIAN-CVE-2026-28490",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-28490",
      "released": "2026-03-16T18:16:07Z"
    },
    {
      "platform": "linux",
      "product": "python-authlib",
      "release": "Debian 14",
      "fixedVersion": "1.6.9-1",
      "fix": "DEBIAN-CVE-2026-28490",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-28490",
      "released": "2026-03-16T18:16:07Z"
    },
    {
      "platform": "linux",
      "product": "python3-authlib",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "0.15.5-1ubuntu0.1~esm2",
      "fix": "python3-authlib 0.15.5-1ubuntu0.1~esm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-python3-authlib-0.15.5-1ubuntu0.1-esm2",
      "released": "2026-03-16T11:16:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-authlib",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "1.3.0-1ubuntu0.1~esm2",
      "fix": "python3-authlib 1.3.0-1ubuntu0.1~esm2",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-python3-authlib-1.3.0-1ubuntu0.1-esm2",
      "released": "2026-04-24T13:16:00Z"
    },
    {
      "platform": "linux",
      "product": "python3-authlib",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "1.6.7-1ubuntu0.1~esm1",
      "fix": "python3-authlib 1.6.7-1ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-python3-authlib-1.6.7-1ubuntu0.1-esm1",
      "released": "2026-04-24T13:16:00Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-08T06:59:42Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}