CVE-2026-61847 — Vulnerability intelligence
— crass
Published:
- CVSS
- 0
- CISA KEV
- Not listed; not proof of no exploitation
Original source text (not a translation)
Crass: A large number of adjacent CSS comments can trigger a SystemStackError
### Impact
When the `:preserve_comments` option is not enabled (which is the default behavior), Crass discards CSS comments by recursively consuming the next token. An attacker who provides a stylesheet containing a very large number of adjacent comments can cause excessive recursion and trigger a `SystemStackError`.
### Patches
This is fixed in Crass 1.0.7, which no longer recurses when discarding comments.
### Workarounds
Set the `:preserve_comments` option to `true` if this is acceptable to your use case (recursion doesn't occur when comments are preserved).