In LibSass 3.5.5, a heap-based buffer over-read exists in Sass::Prelexer::parenthese_scope in prelexer.hpp. References: https://github.com/sass/libsass/issues/2814
Created libsass tracking bugs for this issue: Affects: epel-7 [bug 1668920] Affects: fedora-all [bug 1668919]