CVE-2019-6283: Sass-Lang Libsass

Medium severity, CVSS 6.5. EPSS: 1.9% chance of exploitation in the next 30 days.

In LibSass 3.5.5, a heap-based buffer over-read exists in Sass::Prelexer::parenthese_scope in prelexer.hpp.

Affected products

• Sass-Lang Libsass: version 3.5.5 only

Published 2019-01-14. Last modified 2026-06-17.