| Name | CVE-2026-126207 |
| Description | Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Prior to 2.25.3, Loofah::HTML5::Scrub.scrub_css checks only the first parse of a style attribute, then rebuilds CSS with identifier escapes decoded so escaped parentheses, property names, comments, or quotes can become a live url() without a second safety check. An attacker can use list-style to make a viewer's browser request an attacker-chosen URL when content renders, or cursor to make the request on hover. The request can disclose the viewer's IP address, user agent, access timing, and access to internal-network hosts, but no script survives sanitization and the attacker cannot read the response. This issue is fixed in version 2.25.3. |
| 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) |
The table below lists information on source packages.
| Source Package | Release | Version | Status |
|---|---|---|---|
| ruby-loofah (PTS) | bookworm | 2.19.1-1 | vulnerable |
| trixie | 2.24.0-1 | vulnerable | |
| forky | 2.25.2-1 | vulnerable | |
| sid | 2.25.3-1 | 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) | 2.25.3-1 |
https://github.com/flavorjones/loofah/security/advisories/GHSA-m3x9-938q-5767
https://github.com/flavorjones/loofah/pull/324
https://github.com/flavorjones/loofah/commit/b198a36e44c9c5408163ac50787825e8ca0b166b (v2.25.3)