by Kastro
Paper/Archive/CVE-2026-16383

CVE-2026-16383

Mozilla Firefox — Mitigation bypass in the DOM: Networking component

EPSS 0.6%CVSS 9.8
critical.is priorityof 100
39
CVSS 9.8 (ADP)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 47.1.471 × 209.4No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Mitigation bypass in the DOM: Networking component. This vulnerability was fixed in Firefox 153, Firefox ESR 140.13, Thunderbird 153, and Thunderbird 140.13.

Affected

ProductAffectedFixed inSource
Firefoxsee advisory140.13CNA
Thunderbirdsee advisory140.13CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refbugzilla.mozilla.org/show_bug.cgi?id=2041902refmozilla.org/security/advisories/mfsa2026-68refmozilla.org/security/advisories/mfsa2026-70refmozilla.org/security/advisories/mfsa2026-71refmozilla.org/security/advisories/mfsa2026-72