GitHub Advisoryadvisory · RubyGems

GHSA-8vfg-2r28-hvhj Crass: Non-ASCII characters cause superlinear CPU consumption

MEDIUM Published 2026-10-29 Modified 2026-10-29 Official page ↗
Aliases
CVE-2026-61848
Ecosystem
RubyGems
Packages
crass
Severity
Moderate
CVSS vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L
Weaknesses
CWE-400
Reviewed
2026-10-29

Affected packages

• RubyGems crass: < 1.0.7 → fixed in 1.0.7

Description

Impact When parsing an input containing non-ASCII characters, inefficiencies in how Crass tracks the positions of multi-byte characters result in superlinear parsing time. An attacker-controlled input consisting of many non-ASCII characters could cause excessive CPU consumption and potentially denial of service. Patches This is fixed in Crass 1.0.7. Workarounds Avoid passing non-ASCII input to Crass. Or cultivate patience.

Related

Alias · CVE (1)

  • CVE-2026-61848 Crass is a Ruby CSS parser that's fully compliant with the CSS Syntax Level 3 specification. vulnerability

Weakness · CWE (1)

  • CWE-400 Uncontrolled Resource Consumption weakness

References