USN-7534-1: Flask vulnerability
Publication date
26 May 2025
Overview
Flask could be made to sign sessions with stale keys.
Releases
Packages
- flask - Micro web framework based on Werkzeug and Jinja2
Details
It was discovered that Flask incorrectly handled key rotation.
An attacker could possibly use this issue to sign sessions
with stale keys.
It was discovered that Flask incorrectly handled key rotation.
An attacker could possibly use this issue to sign sessions
with stale keys.
Update instructions
In general, a standard system update will make all the necessary changes.
Learn more about how to get the fixes.The problem can be corrected by updating your system to the following package versions:
| Ubuntu Release | Package Version | ||
|---|---|---|---|
| 25.04 plucky | python3-flask – 3.1.0-2ubuntu1.1 | ||
Reduce your security exposure
Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.