CVE-2026-124880 · Runtime
NO FIX YET · SEE WHAT TO DO
Firefox has a use-after-free bug in its DOM Core and HTML component, where memory is used after it has been freed. The sources do not state what an attacker gets beyond that, so the impact is not confirmed.
first public Nov 10, 2026 · 1 source
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Anyone running Firefox or Firefox ESR builds older than the fixed versions. Browsers that do not run Firefox are not affected. The sources do not say whether a page visit alone is enough to trigger the bug.
Not affected if esr-115.45-or-later, esr-153.7-or-later, firefox-160-or-later
Who cares browsers, firefox
firefox --version on the machine.160, Firefox ESR 115.45, Firefox ESR 153.7.160115.45153.7Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, and Firefox ESR 153.7.
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