CVE-2026-124866 · Other
NO FIX YET · SEE WHAT TO DO
A use-after-free bug in the Layout component of Firefox can corrupt memory when a page is rendered. The sources do not state what an attacker gets beyond that.
first public Nov 10, 2026 · 1 source
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Anyone running Firefox older than version 160 or Firefox ESR older than 153.7. The sources do not describe the trigger conditions, so the unknown part is whether ordinary browsing is enough to reach the flaw.
Not affected if already-updated
Who cares browser, firefox
about:support in Firefox and read the Application Basics version160 (or 153.7 on the ESR channel)160153.7Use-after-free in the Layout component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.
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