CVE-2026-53511

Name	CVE-2026-53511
Description	calibre is an e-book manager. Prior to 9.10.0, a malicious EPUB, OPF, or PDF file can execute arbitrary Python code when its metadata is read by calibre, including through Add books or Edit books, by embedding a custom column definition with a python: template in calibre:user_metadata that is passed unsanitized to exec() in the template formatter. This issue is fixed in version 9.10.0.
Source	CVE (at NVD; CERT, ENISA, LWN, oss-sec, fulldisc, Debian ELTS, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
calibre (PTS)	bullseye	5.12.0+dfsg-1+deb11u2	vulnerable
	bullseye (security)	5.12.0+dfsg-1+deb11u4	vulnerable
	bookworm	6.13.0+repack-2+deb12u6	vulnerable
	trixie	8.5.0+ds-1+deb13u2	vulnerable
	forky	9.10.0+ds+~0.10.6-1	fixed
	sid	9.11.0+ds+~0.10.6-1	fixed

The information below is based on the following data on fixed versions.

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
calibre	source	(unstable)	9.10.0+ds+~0.10.6-1

Notes

https://github.com/kovidgoyal/calibre/security/advisories/GHSA-2j4m-2q7x-2c47
Fixed by: https://github.com/kovidgoyal/calibre/commit/712f4e1ff5c1e798c335bef3bacc4efdee052e9c (v9.10.0)