{"id":"CVE-2019-18798","aliases":["DEBIAN-CVE-2019-18798","EUVD-2019-8503","GHSA-3gpc-2x2f-5fxx","JLSEC-2026-506","UBUNTU-CVE-2019-18798"],"status":"published","title":"LibSass before 3.6.3 allows a heap-based buffer over-read in Sass::weaveParents in ast_sel_weave...","description":"LibSass before 3.6.3 allows a heap-based buffer over-read in Sass::weaveParents in ast_sel_weave.cpp.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01053,"percentile":0.64582,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125"],"published":"2019-11-06T15:07:20Z","modified":"2026-10-24T10:51:21Z","fixes":[{"ecosystem":"Debian:12","package":"libsass","fixed_in":["3.6.3-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"libsass","fixed_in":["3.6.3-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"libsass","fixed_in":["3.6.3-1"],"sources":["osv"]},{"ecosystem":"Julia","package":"libsass_jll","fixed_in":["3.6.4+0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"libsass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.3-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"libsass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.3-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"libsass","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.6.3-1"}]}]},{"source":"osv","ecosystem":"Julia","package":"libsass_jll","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.6.4+0"}]}]}],"products":[{"vendor":"sass-lang","product":"libsass"}],"references":[{"url":"https://github.com/sass/libsass/issues/2999","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","evidence","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2019-18798"},{"url":"https://github.com/advisories/GHSA-3gpc-2x2f-5fxx"},{"url":"https://security-tracker.debian.org/tracker/CVE-2019-18798","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2019-18798","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2019-18798","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2019-18798","description":"LibSass before 3.6.3 allows a heap-based buffer over-read in Sass::weaveParents in ast_sel_weave.cpp.","status":"published","published":"2019-11-06T15:07:20Z","modified":"2024-08-05T02:02:39.698Z","updated_at":"2026-11-02T14:32:23.485011Z"}],"euvd":[{"id":"EUVD-2019-8503","description":"LibSass before 3.6.3 allows a heap-based buffer over-read in Sass::weaveParents in 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