CVE-2026-61846
Crass: Deeply nested CSS blocks and functions can trigger a SystemStackError or excessive memory usage
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
Crass is a Ruby CSS parser that's fully compliant with the CSS Syntax Level 3 specification. Prior to 1.0.7, Crass recursively parses `CSS simple blocks and functions` without a depth guard. An attacker-controlled CSS value containing deeply nested blocks or functions can recurse until Ruby raises `SystemStackError`: stack level too deep, or cause excessive memory usage. Version 1.0.7 adds a configurable depth limit with a conservative default. This issue is fixed in version 1.0.7.
| CWE | CWE-674 |
| Vendor | rgrove |
| Product | crass |
| Published | Oct 30, 2026 |
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Affected Versions
rgrove / crass
< 1.0.7