{"id":"CVE-2026-74983","aliases":[],"url":"https://o3.security/vulnerability/CVE-2026-74983","summary":"Mitigation bypass in the Data Loss Prevention component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.","details":"Mitigation bypass in the Data Loss Prevention component. This vulnerability was fixed in Firefox 154, Firefox ESR 140.14, Firefox ESR 153.1, Thunderbird 154, Thunderbird 140.14, and Thunderbird 153.1.","published":"2026-08-18T13:17:39.077","modified":"2026-08-19T15:47:50.117","cvss":{"score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N"},"epss":null,"cisaKev":null,"exploitsKnown":null,"affectedPackages":[],"fix":null,"references":[{"type":"WEB","url":"https://bugzilla.mozilla.org/show_bug.cgi?id=2051897"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2026-74/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2026-76/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2026-77/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2026-78/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2026-79/"},{"type":"ADVISORY","url":"https://www.mozilla.org/security/advisories/mfsa2026-80/"}],"provenance":{"sources":["OSV.dev","NVD","FIRST.org (EPSS)"],"lastVerified":"2026-08-19T15:47:50.117"}}