Paper/Archive/CVE-2026-92079

CVE-2026-92079

Mozilla Firefox — Mitigation bypass in the Widget: Win32 component

CVSS 9.1 (ADP)9.1 / 10 × 3027.3 Not in CISA KEV+300.0 EPSS percentile 16.5.165 × 203.3 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

Mitigation bypass in the Widget: Win32 component. This vulnerability was fixed in Firefox 156, Firefox ESR 153.3, Thunderbird 156, and Thunderbird 153.3.

Affected

ProductAffectedFixed inSource

Firefoxsee advisory153.3CNA

Thunderbirdsee advisory153.3CNA

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: yes · Technical impact: total

References

refbugzilla.mozilla.org/show_bug.cgi?id=2067531 refmozilla.org/security/advisories/mfsa2026-90 refmozilla.org/security/advisories/mfsa2026-93 refmozilla.org/security/advisories/mfsa2026-94 refmozilla.org/security/advisories/mfsa2026-96