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ruby-crass vulnerabilities

Vulnerability published for ruby-crass in the last 30 days: 1. Listed in the KEV catalogue: 0.

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Vulnerability: 1

  1. CVE-2026-116695

    Medium · CVSS 5.3EPSS 0.35%Fix available

    Crass: Incorrect tokenization of bad URLs enables CSS sanitizer bypass

    Crass is a Ruby CSS parser that is compliant with the CSS Syntax Level 3 specification. Prior to 1.0.8, Crass incorrectly treats a closing parenthesis after an escaped backslash as escaped while consuming the remnants of a bad URL. Crass therefore keeps declarations, style rules, or at-rules inside a bad URL token even though a browser treats them as live CSS. A sanitizer that parses untrusted CSS with Crass and reserializes it without rejecting the bad URL can allow CSS used for UI redress, external resource loading, or CSS-based data exfiltration, but this issue does not enable script execution in modern browsers. This issue is fixed in ver

    ruby-crassOperating systems
    • Update to 1.0.8-1
    Published Updated
    Source advisory 1 ↗Source advisory 2 ↗Source advisory 3 ↗

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