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Fedora 43 python3.9 Security Update for CVE-2026-4786 and CVE-2026-6100

fedora
Calendar Grey April 30, 2026
Dist Fedora Esm H88
Python 3.9 security fixes for CVE-2026-4786 and CVE-2026-6100 enhance system protection in Fedora 43.
Security fixes for CVE-2026-4786 and CVE-2026-6100

Summary

Python 3.9 package for developers.

This package exists to allow developers to test their code against an older

version of Python. This is not a full Python stack and if you wish to run

your applications with Python 3.9, see other distributions

that support it, such as CentOS or RHEL or older Fedora releases.

Update Information:

Security fixes for CVE-2026-4786 and CVE-2026-6100

Topics%20covered

Topics Covered

security advisory fedora arbitrary code execution information disclosure security fixes python3

Change Log

* Fri Apr 17 2026 Charalampos Stratakis - 3.9.25-9 - Security fixes for CVE-2026-4786 and CVE-2026-6100 Resolves: rhbz#2458019, rhbz#2458227 * Sat Apr 11 2026 Miro Hron\u010dok - 3.9.25-8 - Explicitly build with OpenSSL 3

References


[ 1 ] Bug #2458019 - CVE-2026-6100 python3.9: Python: Arbitrary code execution or information disclosure via use-after-free in decompression modules [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2458019 [ 2 ] Bug #2458227 - CVE-2026-4786 python3.9: Python: Arbitrary code execution via command injection in webbrowser.open() API [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2458227

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-7986d7f994' 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
important
Lowest
Low
Medium
High
Critical

Name: python3.9
Product: Fedora 43
Version: 3.9.25
Release: 9.fc43
URL: https://www.python.org/
Summary: Version 3.9 of the Python interpreter

Topics%20covered

Topics Covered

security advisory fedora arbitrary code execution information disclosure security fixes python3

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