USN-8751-1: Urwid vulnerabilities

Publication date

14 September 2026

Overview

Urwid could be made to crash or run programs as your login by other local users.


Packages

  • urwid - Curses-based UI/widget library for Python 3

Details

Katriel Moses discovered that Urwid used a weak PRNG. A local attacker
could possibly use this issue to cause a denial of service or execute
arbitrary code.

Katriel Moses discovered that Urwid used a weak PRNG. A local attacker
could possibly use this issue to cause a denial of service or execute
arbitrary code.

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
26.04 LTS resolute python-urwid-doc –  3.0.4-1ubuntu0.1~esm1  
python3-urwid –  3.0.4-1ubuntu0.1~esm1  
22.04 LTS jammy python-urwid-doc –  2.1.2-2ubuntu0.1
python3-urwid –  2.1.2-2ubuntu0.1
20.04 LTS focal python-urwid-doc –  2.0.1-3ubuntu0.1~esm1  
python3-urwid –  2.0.1-3ubuntu0.1~esm1  
18.04 LTS bionic python-urwid –  2.0.1-2ubuntu0.1~esm1  
python-urwid-doc –  2.0.1-2ubuntu0.1~esm1  
python3-urwid –  2.0.1-2ubuntu0.1~esm1  

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.


Have additional questions?

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