Authlib library contains a signature‑verification bypass vulnerability

{
  "id": "60f806194934c7cafbeff1f3f34718b08adc5c726f09594723a997ff7261f69d",
  "url": "https://kb.cert.org/vuls/id/762428",
  "method": "llm",
  "payload": {
    "kind": "advisory",
    "title": "Authlib library contains a signature‑verification bypass vulnerability",
    "summary": "Authlib accepts JWS objects with an empty signatures array as verified, potentially allowing forged payloads. The announcement says no official patch is available.",
    "evidence": "Authlib (versions up to and including 1.7.2) contain a signature‑verification bypass",
    "products": [
      {
        "name": {
          "value": "Authlib",
          "evidence": "Authlib (versions up to and including 1.7.2)"
        },
        "prerequisites": [],
        "fixed_versions": [],
        "affected_versions": [
          {
            "value": "versions up to and including 1.7.2",
            "evidence": "Authlib (versions up to and including 1.7.2)"
          }
        ]
      }
    ],
    "severity": "unknown",
    "fixed_cves": [],
    "related_cves": [
      {
        "value": "CVE-2026-96760",
        "evidence": "As discussed in CVE-2026-96760"
      }
    ],
    "security_relevant": true,
    "severity_evidence": null
  },
  "source_id": "official-cert-cc-vulnerability-notes",
  "document_id": 23372,
  "published_at": "2026-09-28T19:36:11.488+00:00"
}