CVE-2025-4918Critical· 9.8▾ MidnightAn attacker was able to perform an out-of-bounds read or write on a JavaScript `Promise` object. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2.
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 53.9 · likelihood 1.9 · 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
9.4%
An attacker was able to perform an out-of-bounds read or write on a JavaScript Promise object. This vulnerability was fixed in Firefox 138.0.4, Firefox ESR 128.10.1, Firefox ESR 115.23.1, Thunderbird 128.10.2, and Thunderbird 138.0.2.
firefox < 115.23.1firefox < 138.0.4firefox >= 116.0, < 128.10.1thunderbird < 128.10.2thunderbird >= 138.0, < 138.0.2Upgrade past the affected range:
firefox 128.10.1thunderbird 138.0.2Connected by shared product, vendor, weakness, or advisory.
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