HIGH GitHub
CVE-2026-61845
Crass : Large numeric exponents cause CPU and memory denial of service
### Impact
Crass converts CSS scientific notation number values with unbounded exponentiation before it clamps the result to `Float::MAX`. Applications that use Crass to parse attacker-controlled CSS strings can be forced to spend disproportionate CPU and memory parsing a tiny input, possibly resulting in a crash.
### Patches
This is fixed in Crass 1.0.7.
### Related
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/crass/GHSA-6wmf-3r64-vcwv.yml
Affected Products
- rubygems/crass < 1.0.7
References
- https://github.com/advisories/GHSA-6wmf-3r64-vcwv
- https://github.com/rgrove/crass/security/advisories/GHSA-6wmf-3r64-vcwv
- https://github.com/rgrove/crass/releases/tag/v1.0.7
- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/crass/GHSA-6wmf-3r64-vcwv.yml
This high severity vulnerability was published on 2026-10-20 via GitHub. Affected: rubygems/crass < 1.0.7.
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