Alerts This Week
Warning Icon 1 764
Alerts This Week
Warning Icon 1 764

Fedora 43 python-PyMuPDF Important Denial of Service CVE-2026-25556

fedora
Calendar Grey February 23, 2026
Dist Fedora Esm H88
Update for python-PyMuPDF in Fedora 43 addresses Denial of Service issue with critical patch guidance.
mupdf 1.27.1 and dependencies

Summary

This is PyMuPDF, a Python binding for MuPDF - a lightweight PDF and XPS

viewer. MuPDF can access files in PDF, XPS, OpenXPS, epub, comic and fiction

book formats, and it is known for its top performance and high rendering

quality. With PyMuPDF you therefore can also access files with extensions

*.pdf, *.xps, *.oxps, *.epub, *.cbz or *.fb2 from your Python scripts.

Update Information:

mupdf 1.27.1 and dependencies

Topics%20covered

Topics Covered

security advisory denial of service fedora important mupdf python-PyMuPDF

Change Log

* Wed Feb 11 2026 Michael J Gruber - 1.27.1-2 - add added patch * Wed Feb 11 2026 Michael J Gruber - 1.27.1-1 - Update to new upstream release 1.27.1 (rhbz#2412929) - compatibility with mupdf 1.27.1 - new method `Document.repair()` - various fixes * Sun Jan 18 2026 Michael J Gruber - 1.26.5-4 - work around rst2pdf incompatibility with docutils 0.22 * Sat Jan 17 2026 Fedora Release Engineering - 1.26.5-3 - Rebuilt for https://fedoraproject.org/wiki/Fedora_44_Mass_Rebuild * Tue Oct 28 2025 Michael J Gruber - 1.26.5-2 - rebuild for swig 4.4.0 * Sat Oct 11 2025 Michael J Gruber - 1.26.5-1 - Update to new upstream release 1.26.5 (rhbz#2403129) - adjust to mupdf 1.26.9 (and 10) - improve the Python type annotations - various fixes

References


[ 1 ] Bug #2437972 - CVE-2026-25556 mupdf: MuPDF: Denial of Service via crafted input during barcode decoding [fedora-43] https://bugzilla.redhat.com/show_bug.cgi?id=2437972

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-c06fd97a53' 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: python-PyMuPDF
Product: Fedora 43
Version: 1.27.1
Release: 2.fc43
URL: https://github.com/pymupdf/PyMuPDF
Summary: Python binding for MuPDF - a lightweight PDF and XPS viewer

Topics%20covered

Topics Covered

security advisory denial of service fedora important mupdf python-PyMuPDF

Get the latest News and Insights

Get the latest Linux and open source security news straight to your inbox.

Your message here