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Fedora 43 mupdf 1.27.1 Medium Denial of Service Fix FEDORA-2026

Linuxsecurity •LinuxSecurity Advisories • February 23, 2026

MuPDF is a lightweight PDF viewer and toolkit written in portable C. The renderer in MuPDF is tailored for high quality anti-aliased graphics. MuPDF renders text with metrics and spacing accurate to within fractions of a pixel for the highest fidelity in reproducing the look of a printed page on screen. MuPDF has a small footprint. A binary that includes the standard Roman fonts is only one megabyte. A build with full CJK support (including an Asian font) is approximately seven megabytes. MuPDF has support for all non-interactive PDF 1.7 features, and the toolkit provides a simple API for accessing the internal structures of the PDF document. Example code for navigating interactive links and bookmarks, encrypting PDF files, extracting fonts, images, and searchable text, and rendering pages to image files is provided. Update Information : mupdf 1.27.1 and dependencies

MuPDF is a lightweight PDF viewer and toolkit written in portable C.

The renderer in MuPDF is tailored for high quality anti-aliased

graphics. MuPDF renders text with metrics and spacing accurate to

within fractions of a pixel for the highest fidelity in reproducing

the look of a printed page on screen.

MuPDF has a small footprint. A binary that includes the standard

Roman fonts is only one megabyte. A build with full CJK support

(including an Asian font) is approximately seven megabytes.

MuPDF has support for all non-interactive PDF 1.7 features, and the

toolkit provides a simple API for accessing the internal structures of

the PDF document. Example code for navigating interactive links and

bookmarks, encrypting PDF files, extracting fonts, images, and

searchable text, and rendering pages to image files is provided.

mupdf 1.27.1 and dependencies

* Thu Feb 12 2026 Michael J Gruber - 1.27.1-4 - add versioned requires to make rpminspect happy * Tue Feb 10 2026 Michael J Gruber - 1.27.1-3 - ship pkgconfig file (rhbz#2430595) * Tue Feb 10 2026 Michael J Gruber - 1.27.1-2 - fix CVE-2026-25556 * Thu Feb 5 2026 Michael J Gruber - 1.27.1-1 - rebase to 1.27.1 (rhbz#2412002) - changes to mutool run to bring it into sync with WASM library - improvements for text extraction - improved HTML+CSS support - mutool grep: new tool to for text in documents - various bugfixes * Fri Jan 16 2026 Fedora Release Engineering - 1.26.9-5 - Rebuilt for * Tue Oct 28 2025 Michael J Gruber - 1.26.9-4 - rebuild for swig 4.4.0

[ 1 ] Bug #2437972 - CVE-2026-25556 mupdf: MuPDF: Denial of Service via crafted input during barcode decoding [fedora-43]

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

The full story

This article is one source in a clustered incident — the cluster page carries the summary, timeline and every other outlet covering it.

Fedora 43 and CentOS 8 Address MuPDF Vulnerabilities Fedora 43 has released a fix for a medium denial of service vulnerability in MuPDF, a lightweight PDF viewer. Additionally, CentOS 8 has issued a security update addressing a vulnerability related to Poppler, which also utilizes MuPDF. Both updates aim to enhance security for users relying on these PDF tools. 2 sources 22

Extracted Entities

Fedora 43 mupdf 1.27.1 Medium Denial of Service Fix FEDORA-2026

The full story

Extracted Entities

Attack Types (1)

Companies (1)

CVEs (1)