FIREFOX · CVE-2026-124946 · Runtime
NO FIX YET · SEE WHAT TO DO
Firefox's JavaScript engine has an invalid pointer bug in its JIT component, which compiles JavaScript to machine code. The sources do not say what an attacker can achieve beyond memory corruption.
first public Nov 10, 2026 · 1 source
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Anyone running Firefox before version 160 is exposed to this JavaScript engine flaw. The sources do not describe the trigger conditions, so whether a web page alone is enough is unknown. Users on current Firefox releases are not affected.
Not affected if firefox-160-or-later
Who cares browser, firefox
160 are affected per the source160 or laterInvalid pointer in the JavaScript Engine: JIT component. This vulnerability was fixed in Firefox 160.
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