Authlib: JWS/JWT accepts unknown crit headers (RFC violation → possible authz bypass)
Authlib is a Python library which builds OAuth and OpenID Connect servers.
Red Hat Quay 3.9.17
Released 2025-12-10 · Red Hat rating Important · View on Red Hat →
Authlib is a Python library which builds OAuth and OpenID Connect servers.
Applications and libraries which misuse connection.serverAuthenticate (via callback field ServerConfig.PublicKeyCallback) may be susceptible to an authorization bypass.
Calling Decoder.Decode on a message which contains deeply nested structures can cause a panic due to stack exhaustion.
SSH clients receiving SSH_AGENT_SUCCESS when expecting a typed response will panic and cause early termination of the client process.
Authlib is a Python library which builds OAuth and OpenID Connect servers.
An attacker can craft an input to the Parse functions that would be processed non-linearly with respect to its length, resulting in extremely slow parsing.