CVE-2025-3030High· 8.1▾ TwilightMemory safety bugs present in Firefox 136, Thunderbird 136, Firefox ESR 128.8, and Thunderbird 128.8. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited …
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 44.6 · likelihood 0.1 · exploitation 0
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Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.5%
Memory safety bugs present in Firefox 136, Thunderbird 136, Firefox ESR 128.8, and Thunderbird 128.8. 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 137, Firefox ESR 128.9, Thunderbird 137, and Thunderbird 128.9.
firefox < 128.8.0firefox < 136.0thunderbird < 128.8.0thunderbird >= 129.0, < 136.0Upgrade past the affected range:
firefox 136.0thunderbird 136.0Connected by shared product, vendor, weakness, or advisory.
CVE-2026-74944Critical· 9.8Use-after-free in the DOM: Core & HTML component
CVE-2026-74943Critical· 9.8Use-after-free in the Graphics: ImageLib component
CVE-2026-74940Critical· 9.8Use-after-free in the Graphics: Text component
CVE-2026-74936Critical· 9.8Use-after-free in the JavaScript: WebAssembly component
CVE-2022-26486Critical· 9.6An unexpected message in the WebGPU IPC framework could lead to a use-after-free and exploitable sandbox escape
CVE-2022-26485High· 8.8Removing an XSLT parameter during processing could have lead to an exploitable use-after-free