PT-2026-108341 · Azure Linux · Python-Jwt
Published
2026-09-28
·
Updated
2026-09-28
None
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PyJWT is a Python implementation of JSON Web Token standards. From 2.13.0 until 2.14.0, PyJWS. load in jwt/api jws.py is affected because parser catches ValueError but not RecursionError. This occurs when a deeply nested token header reaches json.loads. As a result, RecursionError escapes the documented PyJWT error hierarchy. Consequently, an unauthenticated malformed token can cause a request-level failure and HTTP 500. This issue is fixed in version 2.14.0.
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Related Identifiers
Affected Products
Python-Jwt