CVE-2026-116804

Name	CVE-2026-116804
Description	DOMPurify from 3.4.4 before 3.4.17 contains a SAFE_FOR_TEMPLATES bypass that lets attackers preserve template expressions in attached shadow roots when using RETURN_DOM, RETURN_DOM_FRAGMENT, or IN_PLACE modes. Attackers can split expressions across text nodes separated by disallowed elements, which merge after removal and are evaluated by downstream template engines for cross-site scripting.
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)
Debian Bugs	1152298

Vulnerable and fixed packages

The table below lists information on source packages.

Source Package	Release	Version	Status
node-dompurify (PTS)	bookworm	2.4.1+dfsg+~2.4.0-2+deb12u1	fixed
	bookworm (security)	2.4.1+dfsg+~2.4.0-2	fixed
	trixie	3.1.7+dfsg+~3.0.5-2	fixed
	forky	3.4.16+dfsg-1	vulnerable
	sid	3.4.17+dfsg-1	fixed

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

Package	Type	Release	Fixed Version	Debian Bugs
node-dompurify	source	bookworm	(not affected)
node-dompurify	source	trixie	(not affected)
node-dompurify	source	(unstable)	3.4.17+dfsg-1	1152298

Notes

[trixie] - node-dompurify <not-affected> (Vulnerable code introduced in 3.4.4 upstream)
[bookworm] - node-dompurify <not-affected> (Vulnerable code introduced in 3.4.4 upstream)
https://github.com/cure53/DOMPurify/security/advisories/GHSA-cg2g-xh64-v4q7