CVE-2017-11554: Libsass

High severity, CVSS 7.5. EPSS: 1.9% chance of exploitation in the next 30 days.

There is a stack consumption vulnerability in the lex function in parser.hpp (as used in sassc) in LibSass 3.4.5. A crafted input will lead to a remote denial of service.

Affected products

• Libsass Libsass: version 3.4.5 only

Published 2017-07-23. Last modified 2026-06-17.