critical9.8
CVE-2026-96760
Authlib (v1.7.2 and below) contains a signature verification bypass vulnerability.
Impact
Authlib (v1.7.2 and below) contains a signature verification bypass vulnerability. The JsonWebSignature.deserialize_json() method accepts a JSON Serialization JWS object and returns the payload as successfully verified without checking for a signature and without requiring a cryptographic key.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| pip | authlib | <= 1.8.0 | 1.9.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-6v38-4h7w-rj9h
- https://github.com/authlib/authlib/security/advisories/GHSA-6v38-4h7w-rj9h
- https://nvd.nist.gov/vuln/detail/CVE-2026-96760
- https://github.com/authlib/authlib/pull/938
- https://github.com/authlib/authlib/commit/6c11a02da8730914cea08ec195f1108a40dc6733
- https://github.com/authlib/authlib/releases/tag/v1.9.0
- https://kb.cert.org/vuls/id/762428
- https://www.kb.cert.org/vuls/id/762428
- https://github.com/authlib/authlib