Security Advisory

CVE-2026-32597

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-03-12 21:41:50

Last updated 2026-05-05 17:32:42

Assigner GitHub_M

State PUBLISHED

Description

PyJWT is a JSON Web Token implementation in Python. Prior to 2.12.0, PyJWT does not validate the crit (Critical) Header Parameter defined in RFC 7515 §4.1.11. When a JWS token contains a crit array listing extensions that PyJWT does not understand, the library accepts the token instead of rejecting it. This violates the MUST requirement in the RFC. This vulnerability is fixed in 2.12.0.

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