by Kastro
Paper/Archive/CVE-2026-100829

CVE-2026-100829

Mozilla Firefox — Mitigation bypass in the DOM: Security component

EPSS 0.2%CVSS 9.6
critical.is priorityof 100
32
CVSS 9.6 (ADP)9.6 / 10 × 3028.8Not in CISA KEV+300.0EPSS percentile 14.9.149 × 203.0No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Mitigation bypass in the DOM: Security component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 153.4, and Firefox 157.

Affected

ProductAffectedFixed inSource
Firefoxsee advisory153.4CNA
Thunderbirdsee advisory153.4CNA

Scores by source

CISA ADP9.6CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refbugzilla.mozilla.org/show_bug.cgi?id=2066321refmozilla.org/security/advisories/mfsa2026-100refmozilla.org/security/advisories/mfsa2026-101refmozilla.org/security/advisories/mfsa2026-103refmozilla.org/security/advisories/mfsa2026-97