CVE-2026-39413

LightRAG is vulnerable to a JWT algorithm confusion attack in versions prior to 1.4.14 of its API. An attacker can forge tokens with alg: none in the JWT header because jwt.decode() does not explicitly disallow none, allowing another party to access protected resources without a valid signature. ...

UBUNTU-CVE-2026-28802

Authlib is a Python library which builds OAuth and OpenID Connect servers. From version 1.6.5 to before version 1.6.7, previous tests involving passing a malicious JWT containing alg: none and an empty signature was passing the signature verification step without any changes to the application co...

Authlib 数据伪造问题漏洞

Authlib is an open-source library developed by Authlib developers, designed as a ultimate Python library for building OAuth and OpenID Connect servers. Versions of Authlib from 1.6.5 to 1.6.7 had a data manipulation vulnerability. This vulnerability occurred when malicious JWTs containing alg: no...

EUVD-2025-33725

python-jose thru 3.3.0 allows JWT tokens with 'alg=none' to be decoded and accepted without any cryptographic signature verification. A malicious actor can craft a forged token with arbitrary claims e.g., isadmin=true and bypass authentication checks, leading to privilege escalation or unauthoriz...

CVE-2025-59685

Kazaar 1.25.12 allows a JWT with none in the alg field...

DEBIAN-CVE-2013-0176

The publickeyfromprivatekey function in libssh before 0.5.4, when no algorithm is matched during negotiations, allows remote attackers to cause a denial of service NULL pointer dereference and crash via a "Client: Diffie-Hellman Key Exchange Init" packet...