VYPR
High severity7.5NVD Advisory· Published Mar 13, 2026· Updated May 5, 2026

CVE-2026-32597

CVE-2026-32597

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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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
PyJWTPyPI
< 2.12.02.12.0

Affected products

120

Patches

Vulnerability mechanics

References

5

News mentions

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