CVE-2026-61848 Details
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.
A denial-of-service vulnerability has been identified in the Crass Ruby library, specifically in versions prior to 1.0.7. The issue arises when Crass parses CSS input containing non-ASCII characters. The library's inefficient management of multi-byte character positions leads to superlinear parsing times. As a result, an attacker can craft CSS inputs rich in non-ASCII characters to cause excessive CPU usage, potentially leading to a denial-of-service condition.
Users can upgrade to Crass version 1.0.7 or later to address this vulnerability.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Oct 30, 2026CISA-ADP
Assessed Nov 6, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| http://github.com/rgrove/crass/commit/da29664648bf80a97a6439e030a4814291c9afa5 | [email protected] | Source CodeVendor |
| https://github.com/rgrove/crass/releases/tag/v1.0.7 | [email protected] | Release NotesVendor |
| https://github.com/rgrove/crass/security/advisories/GHSA-8vfg-2r28-hvhj | [email protected] | AdvisoryRemedyVendor |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-400 | Uncontrolled Resource Consumption | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| Crass | < 1.0.7 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Nov 6, 2026 | CVE Modified | CISA-ADP |
| Oct 30, 2026 | New CVE Received | [email protected] |