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[USN-8301-1] SimpleEval vulnerability

Posted on 25 May 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8301-1
May 25, 2026

simpleeval vulnerability
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 26.04 LTS
- Ubuntu 25.10
- Ubuntu 24.04 LTS
- Ubuntu 22.04 LTS
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS

Summary:

SimpleEval could be made to run programs if it received specially crafted
input.

Software Description:
- simpleeval: Python library for evaluating expressions

Details:

Byambadalai Sumiya discovered that SimpleEval did not properly restrict
attribute access and callback handling inside a sandbox. An attacker could
possibly use this issue to execute arbitrary code.

Update instructions:

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

Ubuntu 26.04 LTS
python3-simpleeval 1.0.3-1+deb13u1build0.26.04.1

Ubuntu 25.10
python3-simpleeval 1.0.3-1+deb13u1build0.25.10.1

Ubuntu 24.04 LTS
python3-simpleeval 0.9.12-1+deb12u1build0.24.04.1

Ubuntu 22.04 LTS
python3-simpleeval 0.9.11-1ubuntu0.1~esm1
Available with Ubuntu Pro

Ubuntu 20.04 LTS
python3-simpleeval 0.9.10-1+deb11u1build0.20.04.1
Available with Ubuntu Pro

Ubuntu 18.04 LTS
python-simpleeval 0.9.5-1ubuntu0.1~esm1
Available with Ubuntu Pro
python3-simpleeval 0.9.5-1ubuntu0.1~esm1
Available with Ubuntu Pro

Ubuntu 16.04 LTS
python-simpleeval 0.8.7-1ubuntu0.1~esm1
Available with Ubuntu Pro
python3-simpleeval 0.8.7-1ubuntu0.1~esm1
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-8301-1
CVE-2026-32640

Package Information:
https://launchpad.net/ubuntu/+source/simpleeval/1.0.3-1+deb13u1build0.26.04.1
https://launchpad.net/ubuntu/+source/simpleeval/1.0.3-1+deb13u1build0.25.10.1
https://launchpad.net/ubuntu/+source/simpleeval/0.9.12-1+deb12u1build0.24.04.1

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