GHSA-6m87-8wg6-hh8w

Duplicate Advisory: Authlib: empty signatures validation in JWS JSON deserialization

Published

2026-09-28

Modified

2026-10-27

Sources

github-advisory

Summary

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-6v38-4h7w-rj9h. This link is maintained to preserve external references. ## Original Description 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

Remediation: No patched version is listed by GitHub.

References

• https://github.com/advisories/GHSA-6m87-8wg6-hh8w