This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-102269 →

UBUNTU-CVE-2026-102269

PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, PyJWT signature segment is affected because signature segment decoding...

Original description

The description as published by the source.

PyJWT is a Python implementation of JSON Web Token standards. Prior to 2.14.0, PyJWT signature segment is affected because signature segment decoding accepts characters outside the canonical Base64URL representation. This occurs when non-Base64URL characters are appended to a valid compact JWS signature segment. As a result, base64url_decode produces the same signature bytes for different serialized segments. Consequently, raw-token revocation checks can fail to recognize an equivalent modified token. This issue is fixed in version 2.14.0.

Source: OSV.dev (Open Source Vulnerabilities) OSV