Paper/Archive/CVE-2026-12316

CVE-2026-12316

Mozilla Firefox — Mitigation bypass in the DOM: Security component

EPSS 0.2%CVSS 9.1

critical.is priorityof 100

31

CVSS 9.1 (ADP)9.1 / 10 × 3027.3 Not in CISA KEV+300.0 EPSS percentile 15.8.158 × 203.2 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox 152 and Thunderbird 152.

Affected

ProductAffectedFixed inSource

Firefoxsee advisory152CNA

Thunderbirdsee advisory152CNA

Scores by source

CISA ADP9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refbugzilla.mozilla.org/show_bug.cgi?id=2045496 refmozilla.org/security/advisories/mfsa2026-57 refmozilla.org/security/advisories/mfsa2026-60