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VulnerabilityPublished

CVE-2026-116695: rgrove crass · Interpretation Conflict

Affects rgrove crassSource CVE Database V5

0

Not known to be exploited · CVSS 5.3 Medium : upgrade to 1.0.8 when convenient.

Data as of 27 Oct 2026, 20:42 UTC

CVSS 4.0 base score
5.3Medium
How severe the flaw is on the 0–10 CVSS scale.
Patch
Available – fixed in 1.0.8
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 27 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.

What to do

Upgrade rgrove crass to 1.0.8.

Affected software

ProductAffectedFixed in
rgrovecrassAffected
  • <1.0.8
Fixed in
  • 1.0.8
RubyGemscrasspkg:gem/crassOther threatsAffected
  • <1.0.8
Fixed in
  • 1.0.8

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade Crass to version 1.0.8 or later, where this issue is fixed.

Description

Crass, a Ruby CSS parser, has a vulnerability prior to version 1.0.8 where it incorrectly treats a closing parenthesis after an escaped backslash as escaped when parsing bad URLs. This causes Crass to retain CSS declarations inside a bad URL token that browsers would normally treat as live CSS. This can allow CSS-based UI redress, external resource loading, or data exfiltration when sanitizing untrusted CSS, but it does not enable script execution in modern browsers. The issue is fixed in version 1.0.8.

References

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