All vulnerabilities

CVE-2022-29217

Key confusion through non-blocklisted public key formats

Description

PyJWT is a Python implementation of RFC 7519. PyJWT supports multiple different JWT signing algorithms. With JWT, an attacker submitting the JWT token can choose the used signing algorithm. The PyJWT library requires that the application chooses what algorithms are supported. The application can specify jwt.algorithms.get_default_algorithms() to get support for all algorithms, or specify a single algorithm. The issue is not that big as algorithms=jwt.algorithms.get_default_algorithms() has to be used. Users should upgrade to v2.4.0 to receive a patch for this issue. As a workaround, always be explicit with the algorithms that are accepted and expected when decoding.

Patch Available

Fix available through Seal Security. 

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Fix without upgrading
Score
Severity
Ecosystem
Python
Publish Date
May 24, 2022
Modified Date
November 7, 2023
Score Vector
Affected Versions