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.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - 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. (CVE-2026-116695)

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - 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. (CVE-2026-116695)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Type	Severity
477764	SCA: security update for crass (GHSA-pq4g-8rxf-4g29)	Tenable Cloud Security	SCA Checks	Local	medium
477764	SCA: security update for crass (GHSA-pq4g-8rxf-4g29)	Tenable Self-Hosted Container Security	SCA Checks	Local	medium
372974	Linux Distros Unpatched Vulnerability : CVE-2026-116695	Nessus	Misc.	Local	medium

Detections

Analytics

CVE-2026-116695

medium

Tenable Plugins

medium

medium

medium