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[USN-8231-1] Dynaconf vulnerability

Posted on 06 May 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8231-1
May 06, 2026

python-dynaconf 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

Summary:

Dynaconf could be made to execute arbitrary code.

Software Description:
- python-dynaconf: Configuration Management for Python

Details:

It was discovered that Dynaconf was incorrectly handling template evaluation
in its string resolvers. A remote 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-dynaconf 3.2.12-1ubuntu0.1~esm1
Available with Ubuntu Pro

Ubuntu 25.10
python3-dynaconf 3.1.7-2ubuntu0.25.10.1

Ubuntu 24.04 LTS
python3-dynaconf 3.1.7-2ubuntu0.24.04.1

Ubuntu 22.04 LTS
python3-dynaconf 3.1.7-1ubuntu0.1~esm1
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-8231-1
CVE-2026-33154

Package Information:
https://launchpad.net/ubuntu/+source/python-dynaconf/3.1.7-2ubuntu0.25.10.1
https://launchpad.net/ubuntu/+source/python-dynaconf/3.1.7-2ubuntu0.24.04.1

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