anonhaven

CVE-2026-96760

NONE
Updated Sep 29, 2026
Authlib
Parameter Value
Type CWE-358 Improperly Implemented Security Check for Standard, CWE-347 Improper Verification of Cryptographic Signature, CWE-670 Always-Incorrect Control Flow Implementation, CWE-20 Improper Input Validation
Vendor Authlib
Public PoC No

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.

Weakness Type (CWE)

CWE-358 Improperly Implemented Security Check for Standard
CWE-347 Improper Verification of Cryptographic Signature
CWE-670 Always-Incorrect Control Flow Implementation
CWE-20 Improper Input Validation

Vulnerable Products

authlib:authlib

References 3

https://github.com/authlib/authlib
NVD
https://kb.cert.org/vuls/id/762428
NVD
https://www.kb.cert.org/vuls/id/762428
af854a3a-2127-422b-91ae-364da2661108
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