by Kastro
Paper/Archive/CVE-2026-109774

CVE-2026-109774

Mozilla Firefox — Invalid pointer, undefined behavior in the DOM: Notifications component

EPSS 0.3%CVSS 9.8
critical.is priorityof 100
35
CVSS 9.8 (ADP)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 27.7.277 × 205.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Invalid pointer, undefined behavior in the DOM: Notifications component. This vulnerability was fixed in Firefox 158 and Thunderbird 158.

Affected

ProductAffectedFixed inSource
Firefoxsee advisory158CNA
Thunderbirdsee advisory158CNA

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=2067657refmozilla.org/security/advisories/mfsa2026-106refmozilla.org/security/advisories/mfsa2026-109