CVE-2018-19797: Sass-Lang Libsass

Medium severity, CVSS 6.5. EPSS: 1.8% chance of exploitation in the next 30 days.

In LibSass 3.5.5, a NULL Pointer Dereference in the function Sass::Selector_List::populate_extends in SharedPtr.hpp (used by ast.cpp and ast_selectors.cpp) may cause a Denial of Service (application crash) via a crafted sass input file.

Affected products

• Sass-Lang Libsass: version 3.5.5 only

Published 2018-12-03. Last modified 2026-06-17.