CVE-2026-73490

Name	CVE-2026-73490
Description	Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Prior to 2.25.2, Loofah's HTML5 sanitizer applies its local-reference restriction only to the xlink:href attribute on SVG use and feImage elements, while browsers also accept the plain href attribute. A crafted sanitized SVG can therefore reference an arbitrary same-origin external document; use may render external SVG content containing scripts or other dangerous content, and feImage may load external images for tracking. Applications that sanitize user-supplied SVG with Loofah's default allowlist are affected. This issue is fixed in version 2.25.2.
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
ruby-loofah (PTS)	bullseye	2.7.0+dfsg-1	vulnerable
	bullseye (security)	2.7.0+dfsg-1+deb11u1	vulnerable
	bookworm	2.19.1-1	vulnerable
	trixie	2.24.0-1	vulnerable
	forky	2.25.1-2	vulnerable
	sid	2.25.2-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
ruby-loofah	source	(unstable)	2.25.2-1

Notes

[trixie] - ruby-loofah <no-dsa> (Minor issue)
https://github.com/flavorjones/loofah/security/advisories/GHSA-9wjq-cp2p-hrgf
https://github.com/flavorjones/loofah/pull/308
Fixed by: https://github.com/flavorjones/loofah/commit/20867b9be689521887364b74822c41ef830523c9 (v2.25.2)