FIREFOX · CVE-2026-124862 · Runtime
NO FIX YET · SEE WHAT TO DO
A use-after-free bug in the DOM Core and HTML component of Firefox was fixed in Firefox 160 and Firefox ESR 153.7. The sources do not say what an attacker can achieve with it beyond the memory corruption class.
first public Nov 10, 2026 · 1 source
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Anyone running Firefox builds older than 160, or Firefox ESR older than 153.7. Systems on managed or auto-updating Firefox are typically covered once updated. The sources do not describe a non-default configuration that is required.
Not affected if already-updated
Who cares browser, desktop, firefox
firefox --version160 (Firefox) and 153.7 (Firefox ESR)160153.7Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.
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