CVE-2026-116695

CVE-2026-116695 · Crass: Incorrect tokenization of bad URLs enables CSS sanitizer bypass

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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 version 1.0.8.

CVSS 5.3 · Средний · EPSS 0,4% · Есть исправление

Опубликовано

2026-10-27T20:10:34.010Z

Обновлено

2026-10-27T20:10:34.010Z

Стек: system

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