CVE-2026-42052

Name	CVE-2026-42052
Description	Beets is the media library management system. Prior to version 2.10.0, the bundled web UI uses Underscore template interpolation mode <%= ... %> for untrusted metadata fields. In this runtime, <%= ... %> is raw insertion and HTML escaping is only performed by <%- ... %>. Rendered output is then inserted with .html(...), allowing attacker-controlled markup to become active DOM. This issue has been patched in version 2.10.0.
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
beets (PTS)	bullseye	1.4.9-7	vulnerable
	bookworm	1.6.0-4	vulnerable
	trixie	2.2.0-3	vulnerable
	forky, sid	2.8.0-1	vulnerable

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
beets	source	(unstable)	(unfixed)

https://github.com/beetbox/beets/security/advisories/GHSA-3gxm-wfjx-m847