{"id":"CVE-2025-4919","details":"An attacker was able to perform an out-of-bounds read or write on a JavaScript object by confusing array index sizes. This vulnerability affects Firefox \u003c 138.0.4, Firefox ESR \u003c 128.10.1, Firefox ESR \u003c 115.23.1, Thunderbird \u003c 128.10.2, and Thunderbird \u003c 138.0.2.","modified":"2026-03-13T08:00:13.152730Z","published":"2025-05-17T22:15:19.653Z","related":["ALSA-2025:8049","ALSA-2025:8060","ALSA-2025:8125","ALSA-2025:8607","ALSA-2025:8608","ALSA-2025:8756","MGASA-2025-0165","MGASA-2025-0168","SUSE-SU-2025:01701-1","SUSE-SU-2025:01710-1","SUSE-SU-2025:01813-1","openSUSE-SU-2025:15133-1","openSUSE-SU-2025:15148-1","openSUSE-SU-2025:15149-1"],"references":[{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00024.html"},{"type":"WEB","url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00046.html"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2025-36/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2025-37/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2025-38/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2025-40/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2025-41/"},{"type":"REPORT","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1966614"}],"affected":[{"database_specific":{"source":"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2025-4919.json","unresolved_ranges":[{"events":[{"introduced":"0"},{"fixed":"115.23.1"}]},{"events":[{"introduced":"0"},{"fixed":"138.0.4"}]},{"events":[{"introduced":"116.0"},{"fixed":"128.10.1"}]},{"events":[{"introduced":"0"},{"fixed":"128.10.2"}]},{"events":[{"introduced":"138.0"},{"fixed":"138.0.2"}]}]}}],"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:H"}]}