{"id":"CVE-2026-0877","details":"Mitigation bypass in the DOM: Security component. This vulnerability affects Firefox \u003c 147, Firefox ESR \u003c 115.32, Firefox ESR \u003c 140.7, Thunderbird \u003c 147, and Thunderbird \u003c 140.7.","modified":"2026-04-16T04:30:32.182077671Z","published":"2026-01-13T14:16:38.270Z","related":["ALSA-2026:0667","ALSA-2026:0694","ALSA-2026:0924","ALSA-2026:2220","ALSA-2026:2271","ALSA-2026:2286","SUSE-SU-2026:0122-1","SUSE-SU-2026:0153-1","SUSE-SU-2026:0260-1","SUSE-SU-2026:20086-1","openSUSE-SU-2026:10037-1","openSUSE-SU-2026:10046-1","openSUSE-SU-2026:10058-1","openSUSE-SU-2026:20041-1","openSUSE-SU-2026:20391-1"],"references":[{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2026-01/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2026-02/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2026-03/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2026-04/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2026-05/"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1999257"}],"affected":[{"database_specific":{"unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"115.32.0"}]},{"events":[{"introduced":"0"},{"fixed":"147.0"}]},{"events":[{"introduced":"128.0"},{"fixed":"140.7.0"}]},{"events":[{"introduced":"0"},{"fixed":"140.7.0"}]},{"events":[{"introduced":"0"},{"fixed":"147.0"}]}],"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-0877.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N"}]}