CVE-2026-25635

Name	CVE-2026-25635
Description	calibre is an e-book manager. Prior to 9.2.0, Calibre's CHM reader contains a path traversal vulnerability that allows arbitrary file writes anywhere the user has write permissions. On Windows (haven't tested on other OS's), this can lead to Remote Code Execution by writing a payload to the Startup folder, which executes on next login. This vulnerability is fixed in 9.2.0.
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)
References	DLA-4554-1

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	fixed
	bookworm	6.13.0+repack-2+deb12u6	fixed
	trixie	8.5.0+ds-1+deb13u2	fixed
	forky, sid	9.8.0+ds+~0.10.6-1	fixed

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

Package	Type	Release	Fixed Version	Origin
calibre	source	bullseye	5.12.0+dfsg-1+deb11u4	DLA-4554-1
calibre	source	bookworm	6.13.0+repack-2+deb12u6
calibre	source	trixie	8.5.0+ds-1+deb13u2
calibre	source	(unstable)	9.2.0+ds+~0.10.5-1

Notes

https://github.com/kovidgoyal/calibre/security/advisories/GHSA-32vh-whvh-9fxr
Fixed by: https://github.com/kovidgoyal/calibre/commit/9739232fcb029ac15dfe52ccd4fdb4a07ebb6ce9 (v9.2.0)