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Fedora 42 Python3.14 Important Security Fixes CVE-2026-1502 2026-1fd21102d1

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Calendar Grey April 28, 2026
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Python 3.14 on Fedora 42 receives important security updates for multiple CVEs aimed at fixing execution risks.
Security fixes for CVE-2026-1502, CVE-2026-4786, CVE-2026-5713, CVE-2026-6100 New minor version of the alternate Python interpreter

Summary

Python 3.14 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 python3.14 package provides the "python3.14" executable: the reference

interpreter for the Python language, version 3.

The majority of its standard library is provided in the python3.14-libs package,

which should be installed automatically along with python3.14.

The remaining parts of the Python standard library are broken out into the

python3.14-tkinter and python3.14-test packages, which may need to be installed

separately.

Documentation for Python is provided in the python3.14-docs package.

Packages containing additional libraries for Python are generally named with

the "python3.14-" prefix.

Update Information:

Security fixes for CVE-2026-1502, CVE-2026-4786, CVE-2026-5713, CVE-2026-6100 New minor version of the alternate Python interpreter

Topics%20covered

Topics Covered

security advisory fedora arbitrary code execution important information disclosure python3.14

Change Log

* Thu Apr 16 2026 Charalampos Stratakis - 3.14.4-2 - Security fixes for CVE-2026-1502, CVE-2026-4786, CVE-2026-5713, CVE-2026-6100 Resolves: rhbz#2457944, rhbz#2458224, rhbz#2458488, rhbz#2458016 * Wed Apr 8 2026 Karolina Surma - 3.14.4-1 - Update to Python 3.14.4

References


[ 1 ] Bug #2457944 - CVE-2026-1502 python3.14: Python: HTTP header injection via CR/LF in proxy tunnel headers [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2457944 [ 2 ] Bug #2458016 - CVE-2026-6100 python3.14: Python: Arbitrary code execution or information disclosure via use-after-free in decompression modules [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2458016 [ 3 ] Bug #2458224 - CVE-2026-4786 python3.14: Python: Arbitrary code execution via command injection in webbrowser.open() API [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2458224 [ 4 ] Bug #2458488 - CVE-2026-5713 python3.14: Python: Information disclosure and arbitrary code execution via remote debugging with a malicious process. [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2458488

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-1fd21102d1' 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

Severity
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Name: python3.14
Product: Fedora 42
Version: 3.14.4
Release: 2.fc42
URL: https://www.python.org/
Summary: Version 3.14 of the Python interpreter

Topics%20covered

Topics Covered

security advisory fedora arbitrary code execution important information disclosure python3.14

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