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Fedora 44 python3.11 Security Advisory 2026-6e657e937a CVE-2026-1502 Alert

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Calendar Grey April 28, 2026
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Update for Fedora 44 addressing critical security issues in python3.11 with fixes for multiple CVE vulnerabilities.
Security fixes for CVE-2026-1502, CVE-2026-4786, CVE-2026-6100, CVE-2026-2297, CVE 2026-3644, CVE-2026-4224

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:

Security fixes for CVE-2026-1502, CVE-2026-4786, CVE-2026-6100, CVE-2026-2297, CVE 2026-3644, CVE-2026-4224

Topics%20covered

Topics Covered

security advisory fedora arbitrary code execution security fix command injection python3.11

Change Log

* Fri Apr 17 2026 Charalampos Stratakis - 3.11.15-4 - Security fixes for CVE-2026-1502, CVE-2026-4786, CVE-2026-6100, CVE-2026-2297, CVE 2026-3644, CVE-2026-4224 Resolves: rhbz#2457941, rhbz#2458221, rhbz#2458013, rhbz#2444704, rhbz#2448188, rhbz#2448204 * Sat Apr 11 2026 Miro Hron\u010dok - 3.11.15-3 - Explicitly build with OpenSSL 3

References


[ 1 ] Bug #2444704 - CVE-2026-2297 python3.11: CPython: Logging Bypass in Legacy .pyc File Handling [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2444704 [ 2 ] Bug #2448188 - CVE-2026-3644 python3.11: Incomplete control character validation in http.cookies [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2448188 [ 3 ] Bug #2448204 - CVE-2026-4224 python3.11: Stack overflow parsing XML with deeply nested DTD content models [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2448204 [ 4 ] Bug #2457941 - CVE-2026-1502 python3.11: Python: HTTP header injection via CR/LF in proxy tunnel headers [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2457941 [ 5 ] Bug #2458013 - CVE-2026-6100 python3.11: Python: Arbitrary code execution or information disclosure via use-after-free in decompression modules [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2458013 [ 6 ] Bug #2458221 - CVE-2026-4786 python3.1...

Read the Full Advisory

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-6e657e937a' 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
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Critical

Name: python3.11
Product: Fedora 44
Version: 3.11.15
Release: 4.fc44
URL: https://www.python.org/
Summary: Version 3.11 of the Python interpreter

Topics%20covered

Topics Covered

security advisory fedora arbitrary code execution security fix command injection python3.11

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