CVE-2026-61848
Medium
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.
SeverityMedium
CVSS6.3
Exploit probability—
ProductCrass
PublishedOct 30, 2026
First seenNov 4, 2026
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- crass1.0.7 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| crassRubyGems | v < 1.0.7 | 1.0.7 |
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