by Kastro
Paper/Archive/CVE-2026-92018

CVE-2026-92018

Mozilla Firefox — Sandbox escape in the DOM: Core & HTML component

EPSS 0.3%CVSS 9.6
critical.is priorityof 100
34
CVSS 9.6 (ADP)9.6 / 10 × 3028.8Not in CISA KEV+300.0EPSS percentile 26.0.260 × 205.2No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

Sandbox escape in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, Firefox ESR 153.3, Thunderbird 156, Thunderbird 140.16, and Thunderbird 153.3.

Affected

ProductAffectedFixed inSource
Firefoxsee advisory115.41CNA
Thunderbirdsee advisory140.16CNA

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=2064287refmozilla.org/security/advisories/mfsa2026-90refmozilla.org/security/advisories/mfsa2026-91refmozilla.org/security/advisories/mfsa2026-92refmozilla.org/security/advisories/mfsa2026-93refmozilla.org/security/advisories/mfsa2026-94refmozilla.org/security/advisories/mfsa2026-95refmozilla.org/security/advisories/mfsa2026-96