In LibSass 3.5.5, a heap-based buffer over-read exists in Sass::Prelexer::skipoverscopes in prelexer.hpp when called from Sass::Parser::parse_import(), a similar issue to CVE-2018-11693.
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2019-6286.json"