CVE-2026-8974High· 8.8▾ TwilightMemory safety bugs present in Firefox ESR 140.10 and Firefox 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerab…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 48.4 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 23.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.3%
Memory safety bugs present in Firefox ESR 140.10 and Firefox 150. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. 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-2026-8975High· 8.8Memory safety bugs present in Firefox ESR 115.35, Firefox ESR 140.10 and Firefox 150
CVE-2026-8946High· 7.5Incorrect boundary conditions in the Audio/Video: Web Codecs component
CVE-2026-8973High· 8.8Memory safety bugs present in Firefox 150
CVE-2026-8970High· 8.8Privilege escalation in the Security component
CVE-2026-8968High· 7.5Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component
CVE-2026-8962High· 8.1Mitigation bypass in the DOM: Security component