USN-9083-1: gevent vulnerability

Publication date

12 November 2026

Overview

gevent could allow unintended access to network services.


Packages

Details

It was discovered that the gevent WSGI server incorrectly validated chunked
transfer encoding trailers in HTTP requests. A remote attacker could
possibly use this issue to perform HTTP request smuggling attacks, leading
to privilege escalation.

It was discovered that the gevent WSGI server incorrectly validated chunked
transfer encoding trailers in HTTP requests. A remote attacker could
possibly use this issue to perform HTTP request smuggling attacks, leading
to privilege escalation.

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
22.04 LTS jammy python3-gevent –  21.8.0-1ubuntu0.1~esm1  
20.04 LTS focal python3-gevent –  1.4.0-1.2ubuntu0.1~esm1  
18.04 LTS bionic python-gevent –  1.2.2-2ubuntu0.1~esm1  
python3-gevent –  1.2.2-2ubuntu0.1~esm1  
16.04 LTS xenial python-gevent –  1.1.0-2ubuntu0.1~esm1
python3-gevent –  1.1.0-2ubuntu0.1~esm1

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