Authlib: empty signatures validation in JWS JSON deserialization

影響: pip:authlib <= 1.8.0 → 1.9.0

Authlib (prior to 1.9.0) 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. Root cause authlib/jose/rfc7515/jws.py, read on the installed 1.8.0 artifact: python is_valid = True # set before anything is checked for header_obj in obj["signatures"]: # empty array means the body never…

在 GitHub Advisory Database 阅读

2026/10/27 23:50，GitHub Advisory Database 发布了“Authlib: empty signatures validation in JWS JSON deserialization”（类型：漏洞公告）。严重程度为“严重”（critical）。相关技术：Python。CVE：CVE-2026-96760。