CVE-2026-61848

Name	CVE-2026-61848
Description	Crass is a Ruby CSS parser that's fully compliant with the CSS Syntax Level 3 specification. Prior to 1.0.7, when Crass parses input containing `non-ASCII characters`, inefficiencies in tracking the positions of `multi-byte characters` result in superlinear parsing time. An attacker-controlled CSS input consisting of many `non-ASCII characters` can therefore cause excessive CPU consumption and potentially denial of service. This issue is fixed in version 1.0.7.
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-crass (PTS)	bookworm	1.0.2-3	vulnerable
	trixie	1.0.6-1	vulnerable
	forky, sid	1.0.8-1	fixed

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

Package	Type	Release	Fixed Version	Urgency	Origin	Debian Bugs
ruby-crass	source	(unstable)	1.0.7-1

Notes

https://github.com/rgrove/crass/security/advisories/GHSA-8vfg-2r28-hvhj
https://github.com/rgrove/crass/commit/da29664648bf80a97a6439e030a4814291c9afa5 (v1.0.7)