Critical (9.8) in sass-lang libsass. EPSS 3.8% chance of exploitation in the next 30 days.
A use-after-free vulnerability exists in handle_error() in sass_context.cpp in LibSass 3.4.x and 3.5.x through 3.5.4 that could be leveraged to cause a denial of service (application crash) or possibly unspecified other impact.
Severity
CVSS 3.0
9.8 critical
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS
3.8% chance of exploitation in the next 30 days; higher than 90% of CVEs (scores of 2026-10-31)