CVE-2026-124870 · Runtime
NO FIX YET · SEE WHAT TO DO
Firefox's JavaScript garbage collector has an incorrect boundary condition, which Mozilla fixed in Firefox 160 and Firefox ESR 153.7. The sources do not describe what an attacker can do with it.
first public Nov 10, 2026 · 1 source
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Anyone running Firefox older than 160 or Firefox ESR older than 153.7 is in scope. The sources do not say whether the flaw is reachable from a web page without user interaction, or what the worst outcome is.
Not affected if firefox-160-or-later, firefox-esr-153.7-or-later
Who cares browsers, firefox
160 for Firefox and 153.7 for Firefox ESR.160153.7Incorrect boundary conditions in the JavaScript: GC component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.
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