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[USN-8751-1] Urwid vulnerabilities

Posted on 14 September 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8751-1
September 14, 2026

urwid vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

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

Software Description:
- 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.

Update instructions:

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

Ubuntu 26.04 LTS
python-urwid-doc 3.0.4-1ubuntu0.1~esm1
Available with Ubuntu Pro
python3-urwid 3.0.4-1ubuntu0.1~esm1
Available with Ubuntu Pro

Ubuntu 22.04 LTS
python-urwid-doc 2.1.2-2ubuntu0.1
python3-urwid 2.1.2-2ubuntu0.1

Ubuntu 20.04 LTS
python-urwid-doc 2.0.1-3ubuntu0.1~esm1
Available with Ubuntu Pro
python3-urwid 2.0.1-3ubuntu0.1~esm1
Available with Ubuntu Pro

Ubuntu 18.04 LTS
python-urwid 2.0.1-2ubuntu0.1~esm1
Available with Ubuntu Pro
python-urwid-doc 2.0.1-2ubuntu0.1~esm1
Available with Ubuntu Pro
python3-urwid 2.0.1-2ubuntu0.1~esm1
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-8751-1
CVE-2026-9323

Package Information:
https://launchpad.net/ubuntu/+source/urwid/2.1.2-2ubuntu0.1

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