PT-2026-102365

Name of the Vulnerable Software and Affected Versions PyJWT versions 2.13.0 through 2.13.x Description The HMACAlgorithm.prepare key function is affected because the HMAC key guard only recognizes top-level public JSON Web Key JWK forms and fails to identify container representations. This occurs...

PT-2026-108339

PyJWT is a Python implementation of JSON Web Token standards. From 2.13.0 until 2.14.0, HMACAlgorithm.prepare key in jwt/algorithms.py is affected because raw-JWK detector does not normalize accepted Unicode byte-order marks before checking for JSON. This occurs when a public JWK is prefixed with...

PT-2026-108338

PyJWT is a Python implementation of JSON Web Token standards. From 2.4.0 until 2.14.0, PyJWT HMACAlgorithm.prepare key is affected because asymmetric-key guard relies on textual markers that are absent from DER encoding. This occurs when an application mixes HMAC and asymmetric algorithms and...

PT-2026-102360

Name of the Vulnerable Software and Affected Versions PyJWT versions prior to 2.14.0 Description The is pem format function in jwt/utils.py fails to recognize all PEM representations accepted by the cryptography loader. This occurs when an application uses both HMAC and asymmetric algorithms and...

PT-2026-102363

Name of the Vulnerable Software and Affected Versions PyJWT versions 2.4.0 through 2.13.x Description The HMACAlgorithm.prepare key function is affected because the asymmetric-key guard relies on textual markers that are absent from DER Distinguished Encoding Rules encoding. This occurs when an...

PT-2026-102364

Name of the Vulnerable Software and Affected Versions PyJWT versions 2.13.0 through 2.13.x Description An issue exists in the HMACAlgorithm.prepare key function within jwt/algorithms.py where the raw-JWK detector fails to normalize Unicode byte-order marks BOM before JSON validation. When a publi...

PT-2017-12006

Name of the Vulnerable Software and Affected Versions PyJWT versions 1.5.0 and below Description The issue concerns a symmetric/asymmetric key confusion attack. In PyJWT, the invalid strings check in HMACAlgorithm.prepare key does not account for all PEM encoded public keys, specifically the PKCS...