{"id":"CVE-2018-18500","details":"A use-after-free vulnerability can occur while parsing an HTML5 stream in concert with custom HTML elements. This results in the stream parser object being freed while still in use, leading to a potentially exploitable crash. This vulnerability affects Thunderbird \u003c 60.5, Firefox ESR \u003c 60.5, and Firefox \u003c 65.","modified":"2026-03-12T22:48:20.150113Z","published":"2019-02-05T21:29:00.330Z","related":["MGASA-2019-0060","MGASA-2019-0069","SUSE-SU-2019:0273-1","SUSE-SU-2019:0336-1","SUSE-SU-2019:0336-2","SUSE-SU-2019:0338-1","openSUSE-SU-2019:0132-1","openSUSE-SU-2019:0249-1","openSUSE-SU-2019:0251-1","openSUSE-SU-2019:1758-1","openSUSE-SU-2024:10600-1","openSUSE-SU-2024:10601-1","openSUSE-SU-2024:14572-1"],"references":[{"type":"WEB","url":"http://lists.opensuse.org/opensuse-security-announce/2019-07/msg00021.html"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:0218"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:0269"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3874-1/"},{"type":"ADVISORY","url":"https://www.debian.org/security/2019/dsa-4376"},{"type":"ADVISORY","url":"https://www.debian.org/security/2019/dsa-4392"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:0219"},{"type":"ADVISORY","url":"https://access.redhat.com/errata/RHSA-2019:0270"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2019/01/msg00025.html"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/201903-04"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2019-03/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2019-01/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2019-02/"},{"type":"ADVISORY","url":"https://usn.ubuntu.com/3897-1/"},{"type":"ADVISORY","url":"http://www.securityfocus.com/bid/106781"},{"type":"ADVISORY","url":"https://lists.debian.org/debian-lts-announce/2019/02/msg00024.html"},{"type":"ADVISORY","url":"https://security.gentoo.org/glsa/201904-07"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2018-18500.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"65.0"}]},{"events":[{"introduced":"0"},{"fixed":"60.5"}]},{"events":[{"introduced":"0"},{"fixed":"60.5"}]},{"events":[{"introduced":"0"},{"last_affected":"14.04"}]},{"events":[{"introduced":"0"},{"last_affected":"16.04"}]},{"events":[{"introduced":"0"},{"last_affected":"18.04"}]},{"events":[{"introduced":"0"},{"last_affected":"18.10"}]},{"events":[{"introduced":"0"},{"last_affected":"8.0"}]},{"events":[{"introduced":"0"},{"last_affected":"9.0"}]},{"events":[{"introduced":"0"},{"last_affected":"6.0"}]},{"events":[{"introduced":"0"},{"last_affected":"7.0"}]},{"events":[{"introduced":"0"},{"last_affected":"6.0"}]},{"events":[{"introduced":"0"},{"last_affected":"7.0"}]},{"events":[{"introduced":"0"},{"last_affected":"7.6"}]},{"events":[{"introduced":"0"},{"last_affected":"7.6"}]},{"events":[{"introduced":"0"},{"last_affected":"7.6"}]},{"events":[{"introduced":"0"},{"last_affected":"6.0"}]},{"events":[{"introduced":"0"},{"last_affected":"7.0"}]}]}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"}]}