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USN-5526-2: PyJWT regression

17 August 2022

USN-5526-1 introduced a regression in PyJWT.



  • pyjwt - Python 3 implementation of JSON Web Token


USN-5526-1 fixed vulnerabilities in PyJWT. Unfortunately this caused a
regression by incrementing the internal package version number on Ubuntu
22.04 LTS. This update fixes the problem.

We apologize for the inconvenience.

Original advisory details:

Aapo Oksman discovered that PyJWT incorrectly handled signatures
constructed from SSH public keys. A remote attacker could use this to forge
a JWT signature.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 22.04

In general, a standard system update will make all the necessary changes.