Vulnerability Description
Crass is a Ruby CSS parser that's fully compliant with the CSS Syntax Level 3 specification. Prior to 1.0.7, when the `:preserve_comments` option is not enabled, which is the default, Crass discards CSS comments by recursively consuming the next token. An attacker-provided stylesheet containing a very large number of adjacent comments can cause excessive recursion and trigger a `SystemStackError`, denying service to the parsing application. Preserving comments avoids this recursive path. This issue is fixed in version 1.0.7.
Related Weaknesses (CWE)
References
- https://github.com/rgrove/crass/commit/25d78cc607c54262e9d43ea1930f3ba5bb03dfb5
- https://github.com/rgrove/crass/releases/tag/v1.0.7
- https://github.com/rgrove/crass/security/advisories/GHSA-wwpr-jff3-395c
FAQ
What is CVE-2026-61847?
CVE-2026-61847 is a documented vulnerability. Crass is a Ruby CSS parser that's fully compliant with the CSS Syntax Level 3 specification. Prior to 1.0.7, when the `:preserve_comments` option is not enabled, which is the default, Crass discards C...
How severe is CVE-2026-61847?
CVSS scoring is not yet available for CVE-2026-61847. Check NVD for updates.
Is there a patch for CVE-2026-61847?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.