CVE-2026-8958High· 8.6▾ TwilightInformation disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 47.3 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Oct 14.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.4%
Information disclosure, sandbox escape in the Security: Process Sandboxing component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.
firefox < 140.11.0firefox < 151.0.0thunderbird < 140.11thunderbird < 151.0.0Upgrade past the affected range:
firefox 151.0.0thunderbird 151.0.0Connected by shared product, vendor, weakness, or advisory.
CVE-2025-2857Critical· 10.0Following the recent Chrome sandbox escape (CVE-2025-2783), various Firefox developers identified a similar pattern in our IPC code
CVE-2023-29538Medium· 4.3Under specific circumstances a WebExtension may have received a <code>jar:file:///</code> URI instead of a <code>moz-extension:///</code> URI during a load request
CVE-2026-118008High· 8.8Privilege escalation in the DOM: Navigation component
CVE-2026-117999NoneRace condition in the IPC component
CVE-2026-117976NoneSite isolation issue in the DOM: Navigation component
CVE-2026-118027NoneFrame poisoning in the Layout component