CVE-2026-100770Critical· 9.6▾ MidnightSandbox escape due to use-after-free in the DOM: Content Processes 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…
▾ 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
— → 9.6
none → critical
0.3%
0.3% → 0.3%
Last analysed / modified upstream
Sandbox escape due to use-after-free in the DOM: Content Processes 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 >= 115.0, < 115.42.0firefox >= 140.0.0, < 140.17.0firefox >= 153.0.0, < 153.4.0firefox >= 154.0.0, < 157.0.0thunderbird >= 140.0, < 140.17.0thunderbird >= 153.0, < 153.4.0thunderbird >= 154.0, < 157.0Upgrade past the affected range:
firefox 157.0.0thunderbird 157.0Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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