CVE-2025-14321Critical· 9.8▾ AbyssalPoC availableUse-after-free in the WebRTC: Signaling component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
▾ Abyssal zone — Critical with a public exploit or in-the-wild use
impact 53.9 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Public exploit / PoC code seen in 1 source. Availability, not in-the-wild use.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
Last analysed / modified upstream
0.6%
1 GitHub repo (last check)
Use-after-free in the WebRTC: Signaling component. This vulnerability was fixed in Firefox 146, Firefox ESR 140.6, Thunderbird 146, and Thunderbird 140.6.
firefox < 140.6.0firefox < 146.0thunderbird < 140.6.0thunderbird < 146.0Upgrade past the affected range:
firefox 146.0thunderbird 146.0Connected by shared product, vendor, weakness, or advisory.
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CVE-2026-74936Critical· 9.8Use-after-free in the JavaScript: WebAssembly component
CVE-2022-26485High· 8.8Removing an XSLT parameter during processing could have lead to an exploitable use-after-free
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CVE-2026-74944Critical· 9.8Use-after-free in the DOM: Core & HTML component
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