{
  "cveId": "CVE-2026-54431",
  "url": "https://patchblox.com/security/cve/CVE-2026-54431",
  "summary": "CVE-2026-54431 is fixed in liboauth2 on 1 platform by DEBIAN-CVE-2026-54431 (version 2.3.0-1), released July 3, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "liboauth2: In liboauth2 the Demonstrating Proof-of-Possession (DPoP) verifier accepts a proof whose JSON Web Key (jwk) header co...",
  "description": "In liboauth2 the Demonstrating Proof-of-Possession (DPoP) verifier accepts a proof whose JSON Web Key (jwk) header contains private key\u00A0material. RFC 9449 section 4.3 step 7 requires the verifier to reject\u00A0such a proof but\u00A0oauth2_token_verify() function returns success for a malformed DPoP\u00A0proof that embeds the private Elliptic Curve (EC) key in the header.  This issue was fixed in version 2.3.0",
  "published": "2026-07-02T11:16:17Z",
  "severity": "",
  "epss": 0.00178,
  "epssPercentile": 0.07419,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "liboauth2",
      "release": "Debian 14",
      "fixedVersion": "2.3.0-1",
      "fix": "DEBIAN-CVE-2026-54431",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-54431",
      "released": "2026-07-03T14:54:39Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T19:38:12Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}