fkie_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.

GHSA-8vfg-2r28-hvhj — Crass: Non-ASCII characters cause superlinear CPU consumption

Affected: RubyGems: crass

### Impact

When parsing an input containing non-ASCII characters, inefficiencies in how Crass tracks the positions of multi-byte characters result in superlinear parsing time. An attacker-controlled input consisting of many non-ASCII characters could cause excessive CPU consumption and potentially denial of service.

### Patches

This is fixed in Crass 1.0.7.

### Workarounds

Avoid passing non-ASCII input to Crass. Or cultivate patience.

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fkie_cve-2026-61848

GHSA-8vfg-2r28-hvhj — Crass: Non-ASCII characters cause superlinear CPU consumption