{
  "cveId": "CVE-2026-116672",
  "url": "https://patchblox.com/security/cve/CVE-2026-116672",
  "summary": "CVE-2026-116672 is fixed in python-authlib on 1 platform by DEBIAN-CVE-2026-116672 (version 1.9.1-1), released October 31, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "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. From 0.15 until 1.9.1, the documented ClientConfigurationEndpoint.authenticate_client and ClientConfigurationEndpoint.check_permission reference implementations look up a target client from request-controlled client_id data and check only whether that target is editable, without verifying that request.credential belongs to the target client. Deployments following both examples can allow a client holding any valid registration access token to read, modify, or delete another client\u0027s registration. Changing redirect_uris can enable authorization code or token interception, while deleting registrations can deny service to affected clients. This issue is fixed in version 1.9.1.",
  "published": "2026-10-27T17:16:59Z",
  "severity": "high",
  "cvss": 8.8,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
  "epss": 0.00274,
  "epssPercentile": 0.19927,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "python-authlib",
      "release": "Debian 14",
      "fixedVersion": "1.9.1-1",
      "fix": "DEBIAN-CVE-2026-116672",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-116672",
      "released": "2026-10-31T22:18:21Z"
    }
  ],
  "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"
  }
}