{
  "cveId": "CVE-2026-54603",
  "url": "https://patchblox.com/security/cve/CVE-2026-54603",
  "summary": "CVE-2026-54603 is fixed in ruby-oauth2 on 1 platform, first by DEBIAN-CVE-2026-54603, released August 15, 2026. It is not reported as exploited. Patch Radar priority: High.",
  "title": "ruby-oauth2: OAuth2 is a Ruby wrapper for the OAuth 2.0 and 2.1 authorization frameworks, including OpenID Connect (OIDC)",
  "description": "OAuth2 is a Ruby wrapper for the OAuth 2.0 and 2.1 authorization frameworks, including OpenID Connect (OIDC). From 0.4.0 to 2.0.21, a protocol-relative redirect Location returned to OAuth2::Client#request overrides the request authority, so the bearer Authorization header is sent to an attacker-controlled host, leaking the credential. This issue is fixed in version 2.0.22.",
  "published": "2026-07-28T17:16:52Z",
  "severity": "high",
  "cvss": 8.6,
  "cvssVector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
  "epss": 0.00448,
  "epssPercentile": 0.39224,
  "priority": "High",
  "priorityTier": 3,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "ruby-oauth2",
      "release": "Debian 12.15 (bookworm)",
      "fixedVersion": "1.4.4-1\u002Bdeb12u1",
      "fix": "DEBIAN-CVE-2026-54603",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-54603",
      "released": "2026-08-15T22:38:55Z"
    },
    {
      "platform": "linux",
      "product": "ruby-oauth2",
      "release": "Debian 14",
      "fixedVersion": "2.0.25-1",
      "fix": "DEBIAN-CVE-2026-54603",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-54603",
      "released": "2026-08-15T22:38:55Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T07:25:28Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}