{"id":"CVE-2017-11554","aliases":["DEBIAN-CVE-2017-11554","EUVD-2017-3169","GHSA-qqjx-qv79-g2q3","UBUNTU-CVE-2017-11554"],"status":"published","title":"There is a stack consumption vulnerability in the lex function in parser.hpp (as used in sassc)...","description":"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.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01879,"percentile":0.7958,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-674"],"published":"2017-07-23T03:00:00Z","modified":"2026-10-20T10:47:41Z","fixes":[{"ecosystem":"Debian:12","package":"libsass","fixed_in":["3.5.4-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"libsass","fixed_in":["3.5.4-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"libsass","fixed_in":["3.5.4-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"libsass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.4-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"libsass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.4-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"libsass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.5.4-1"}]}]},{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"libsass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.2.5-1","3.2.5-2","3.3.2-1","3.3.4-1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:18.04:LTS","package":"libsass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.4.3-1","3.4.6-1","3.4.8-1","3.4.8-1ubuntu0.1~esm1"]}],"products":[{"vendor":"libsass","product":"libsass"}],"references":[{"url":"https://github.com/sass/libsass/issues/2445","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","advisory","report"]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=1471780","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Third Party Advisory","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-11554"},{"url":"https://github.com/advisories/GHSA-qqjx-qv79-g2q3"},{"url":"https://security-tracker.debian.org/tracker/CVE-2017-11554","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2017-11554","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2017-11554","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2017-11554","description":"There is a stack consumption vulnerability in the lex function in parser.hpp (as used in sassc) in LibSass 3.4.5. 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