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[USN-8759-1] WebOb vulnerabilities

Posted on 16 September 2026
Ubuntu Security

==========================================================================Ubuntu Security Notice USN-8759-1
September 15, 2026

python-webob vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

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

Summary:

Several security issues were fixed in WebOb.

Software Description:
- python-webob: Python module providing WSGI request and response objects

Details:

It was discovered that WebOb incorrectly handled certain URLs. An
attacker could possibly use this issue to control a redirect or forward
to another URL. This issue was only addressed in Ubuntu 16.04 LTS and
Ubuntu 18.04 LTS. (CVE-2024-42353)

Caleb Brown discovered that WebOb incorrectly handled certain URLs. An
attacker could possibly use this issue to control a redirect or forward
to another URL. (CVE-2026-44889)

Update instructions:

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

Ubuntu 26.04 LTS
python3-webob 1:1.8.9-1ubuntu0.1

Ubuntu 24.04 LTS
python3-webob 1:1.8.7-1ubuntu0.1.24.04.2

Ubuntu 22.04 LTS
python3-webob 1:1.8.6-1.1ubuntu0.2

Ubuntu 20.04 LTS
python3-webob 1:1.8.5-2ubuntu0.1+esm1
Available with Ubuntu Pro

Ubuntu 18.04 LTS
python-webob 1:1.7.3-2ubuntu0.1~esm2
Available with Ubuntu Pro
python3-webob 1:1.7.3-2ubuntu0.1~esm2
Available with Ubuntu Pro

Ubuntu 16.04 LTS
python-webob 1.5.1-1ubuntu0.1~esm2
Available with Ubuntu Pro
python3-webob 1.5.1-1ubuntu0.1~esm2
Available with Ubuntu Pro

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

References:
https://ubuntu.com/security/notices/USN-8759-1
CVE-2024-42353, CVE-2026-44889

Package Information:
https://launchpad.net/ubuntu/+source/python-webob/1:1.8.9-1ubuntu0.1
https://launchpad.net/ubuntu/+source/python-webob/1:1.8.7-1ubuntu0.1.24.04.2
https://launchpad.net/ubuntu/+source/python-webob/1:1.8.6-1.1ubuntu0.2

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