CVE-2026-100781Critical· 9.6▾ MidnightSandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Fir…
▾ 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 30.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.2%
— → 9.6
none → critical
0.2% → 0.4%
Last analysed / modified upstream
Sandbox escape due to incorrect boundary conditions in the Graphics: WebRender component. This vulnerability was fixed in Firefox ESR 153.4, Thunderbird 157, Thunderbird 140.17, Thunderbird 153.4, Firefox 157, Firefox ESR 115.42, and Firefox ESR 140.17.
firefox < 157.0.0firefox >= 115.1.0, < 115.42.0firefox >= 140.0, < 140.17.0firefox >= 153.0, < 153.4.0thunderbird < 157.0thunderbird >= 140.0, < 140.17.0thunderbird >= 153.0, < 153.4.0Upgrade past the affected range:
firefox 153.4.0thunderbird 153.4.0Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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