CVE-2026-92040High· 8.8▾ TwilightUse-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 48.4 · 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 19.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
— → 6.1
none → medium
0.1%
6.1 → 8.8
medium → high
0.1% → 0.4%
Last analysed / modified upstream
Use-after-free in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 156 and Thunderbird 156.
firefox < 156.0.0thunderbird < 156.0Upgrade past the affected range:
firefox 156.0.0thunderbird 156.0Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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