CVE-2026-61848

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.

• CWE-400

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

Published

Oct 30, 2026

Last Modified

Oct 30, 2026

Status

Deferred

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