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Fedora 43 Calibre Critical Arbitrary Code Execution CVE-2026-53511

fedora
Calendar Grey July 13, 2026
Dist Fedora Esm H88
Fixes arbitrary code execution issue in calibre for Fedora 43 with update for CVE-2026-53511 following best practices.
Fixes CVE-2026-53511

Summary

Calibre is meant to be a complete e-library solution. It includes library

management, format conversion, news feeds to ebook conversion as well as

e-book reader sync features.

Calibre is primarily a ebook cataloging program. It manages your ebook

collection for you. It is designed around the concept of the logical book,

i.e. a single entry in the database that may correspond to ebooks in several

formats. It also supports conversion to and from a dozen different ebook

formats.

Supported input formats are: MOBI, LIT, PRC, EPUB, CHM, ODT, HTML, CBR, CBZ,

RTF, TXT, PDF and LRS.

Update Information:

Fixes CVE-2026-53511

Topics%20covered

Topics Covered

security advisory fedora software update arbitrary code execution important calibre

Change Log

* Sun Jul 5 2026 Kevin Fenzi - 9.11.0-1 - Update to 9.11.0. Fixes rhbz#2493338 * Fri Jun 12 2026 Yaakov Selkowitz - 9.9.0-4 - Rebuilt for openssl 4.0 * Mon Jun 8 2026 František Zatloukal - 9.9.0-3 - Rebuilt for icu 78.3 * Sun Jun 7 2026 Kevin Fenzi - 9.9.0-2 - Disable test_mem_leaks for now, it is failing on x86_64 only for some reason * Sat May 30 2026 Kevin Fenzi - 9.9.0-1 - Update to 9.9.0. Fixes rhbz#2482466 * Tue May 19 2026 Michael J Gruber - 9.8.0-2 - add missing tzlocal requires * Mon May 4 2026 Kevin Fenzi - 9.8.0-1 - Update to 9.8.0. Fixes rhbz#2464288 * Thu Apr 16 2026 Jan Grulich - 9.7.0-2 - Rebuild (qt6) * Wed Apr 15 2026 Kevin Fenzi - 9.7.0-1 - Update to 9.7.0. fixes rhbz#2457244

References


[ 1 ] Bug #2498951 - CVE-2026-53511 calibre: Calibre: Arbitrary code execution via malicious e-book file processing [fedora-all] https://bugzilla.redhat.com/show_bug.cgi?id=2498951

Update Instructions

This update can be installed with the "dnf" update program. Use su -c 'dnf upgrade --advisory FEDORA-2026-6776f4e492' 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: calibre
Product: Fedora 43
Version: 9.11.0
Release: 1.fc43
URL: https://calibre-ebook.com/
Summary: E-book converter and library manager

Topics%20covered

Topics Covered

security advisory fedora software update arbitrary code execution important calibre

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