Moderate Header Injection Threat in Fedora 42 with Python 3.11 Update
fedora
March 15, 2026
Update to 3.11.15
Summary
Python 3.11 is an accessible, high-level, dynamically typed, interpreted
programming language, designed with an emphasis on code readability.
It includes an extensive standard library, and has a vast ecosystem of
third-party libraries.
The python3.11 package provides the "python3.11" executable: the reference
interpreter for the Python language, version 3.
The majority of its standard library is provided in the python3.11-libs package,
which should be installed automatically along with python3.11.
The remaining parts of the Python standard library are broken out into the
python3.11-tkinter and python3.11-test packages, which may need to be installed
separately.
Documentation for Python is provided in the python3.11-docs package.
Packages containing additional libraries for Python are generally named with
the "python3.11-" prefix.
Update Information:
Update to 3.11.15
Topics Covered
Change Log
* Tue Mar 3 2026 Tom\u0161 Hrn\u010diar
References
[ 1 ] Bug #2431760 - CVE-2025-11468 python3.11: Missing character filtering in Python [fedora-42]
https://bugzilla.redhat.com/show_bug.cgi?id=2431760
[ 2 ] Bug #2431770 - CVE-2026-0672 python3.11: Header injection in http.cookies.Morsel in Python [fedora-42]
https://bugzilla.redhat.com/show_bug.cgi?id=2431770
[ 3 ] Bug #2431798 - CVE-2025-15282 python3.11: Header injection via newlines in data URL mediatype in Python [fedora-42]
https://bugzilla.redhat.com/show_bug.cgi?id=2431798
Update Instructions
This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-2cca15998f' at the command line. For more information, refer to the dnf documentation available at http://dnf.readthedocs.io/en/latest/command_ref.html#upgrade-command-label
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Name: python3.11
Product: Fedora 42
Version: 3.11.15
Release: 1.fc42
Summary: Version 3.11 of the Python interpreter
Topics Covered
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