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USN-5526-1: PyJWT vulnerability

20 July 2022

PyJWT could allow signature forgery.



  • pyjwt - Python implementation of JSON Web Token


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
Ubuntu 20.04
Ubuntu 18.04

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