CVE-2026-73492

Name	CVE-2026-73492
Description	Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. From 2.25.0 until 2.25.2, Loofah::HTML5::Scrub.allowed_uri? does not reject javascript: or vbscript: URIs whose scheme is split by semicolon-less numeric character references such as &#58, &#9, &#10, or &#13. CGI.unescapeHTML leaves these references encoded, so allowed_uri? reports the URL safe even though a browser decodes an encoded colon or strips encoded whitespace and executes the resulting URI scheme. This issue affects only callers that pass HTML-encoded strings directly to allowed_uri?; Loofah's default sanitize() path is not 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-5qhf-9phg-95m2
https://github.com/flavorjones/loofah/pull/308
Fixed by: https://github.com/flavorjones/loofah/commit/f1be9d893b5a8dd79240441a912d8897e74c38c0 (v2.25.2)