FIREFOX · CVE-2026-124943 · Other
NO FIX YET · SEE WHAT TO DO
Firefox has a use-after-free bug in its Layout component, which handles how page content is arranged. Memory bugs like this can let a malicious web page crash the browser or run code on the visitor's computer.
first public Nov 10, 2026 · 1 source
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Anyone running Firefox older than version 160 is exposed, since the flaw is in the browser's page layout code. Standard browsing of untrusted web pages is the main path. The sources do not say whether any non-default setting is required.
Not affected if firefox-160-or-later
Who cares browser, firefox
160 or later, per the sourceUse-after-free in the Layout component. This vulnerability was fixed in Firefox 160.
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