GHSA-6WMF-3R64-VCWV
Vulnerability from github – Published: 2026-10-20 14:32 – Updated: 2026-10-20 14:32Impact
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": [
{
"package": {
"ecosystem": "RubyGems",
"name": "crass"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"fixed": "1.0.7"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2026-61845"
],
"database_specific": {
"cwe_ids": [
"CWE-674"
],
"github_reviewed": true,
"github_reviewed_at": "2026-10-20T14:32:39Z",
"nvd_published_at": null,
"severity": "HIGH"
},
"details": "### Impact\n\nCrass 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.\n\n### Patches\n\nThis is fixed in Crass 1.0.7.\n\n### Related\n\n- https://github.com/rubysec/ruby-advisory-db/blob/master/gems/crass/GHSA-6wmf-3r64-vcwv.yml",
"id": "GHSA-6wmf-3r64-vcwv",
"modified": "2026-10-20T14:32:39Z",
"published": "2026-10-20T14:32:39Z",
"references": [
{
"type": "WEB",
"url": "https://github.com/rgrove/crass/security/advisories/GHSA-6wmf-3r64-vcwv"
},
{
"type": "PACKAGE",
"url": "https://github.com/rgrove/crass"
},
{
"type": "WEB",
"url": "https://github.com/rgrove/crass/releases/tag/v1.0.7"
},
{
"type": "WEB",
"url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/crass/GHSA-6wmf-3r64-vcwv.yml"
},
{
"type": "WEB",
"url": "https://rubygems.org/gems/crass/versions/1.0.7"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H",
"type": "CVSS_V4"
}
],
"summary": "Crass : Large numeric exponents cause CPU and memory denial of service"
}
Drag nodes to arrange them. Double-click a related vulnerability to open it, or a source to visit its link. The Physics button on the left tunes the layout and the simulation; the legend at the bottom left hides or shows nodes by kind and by sighting type.
Sightings
| Author | Source | Type | Date | Other |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or observed by the user.
- Confirmed: The vulnerability has been validated from an analyst's perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
- Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
- Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
- Not confirmed: The user expressed doubt about the validity of the vulnerability.
- Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline
Sightings and recorded dates, grouped by day · UTC
Loading timeline…
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
Related by attack behaviour
Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.