CVE-2026-92018Critical· 9.6▾ MidnightSandbox 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.
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 52.8 · likelihood 0.1 · exploitation 0
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Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake.
Exploit-prediction probability, daily snapshots since Sep 19.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
— → 7.5
none → high
0.2%
Last analysed / modified upstream
0.2% → 0.4%
7.5 → 9.6
high → critical
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
CVE-2026-92041Critical· 9.1Mitigation bypass in the DOM: Networking component
CVE-2026-92057Critical· 9.1Mitigation bypass in the Enterprise Policies component
CVE-2026-92019High· 8.1Mitigation bypass in the Remote Settings Client component
CVE-2026-92030Medium· 5.4Mitigation bypass in the DOM: Copy & Paste and Drag & Drop component
CVE-2026-92039Medium· 6.3Mitigation bypass in the DOM: Notifications component
CVE-2026-92038Critical· 9.1Mitigation bypass in the Remote Settings Client component