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.
Exploitability
AV:NAC:LPR:NUI:NScope
S:UImpact
C:NI:NA:H7.5/CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H