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Vulnerability DatabaseCVE-2026-32597
CVE-2026-32597:
Python vulnerability analysis and mitigation
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.
Wiz Threat Research note: This vulnerability's initial access potential has been overridden to FALSE by the Wiz Research team, as it does not allow RCE on its own.
Source: NVD
Related Python vulnerabilities:
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