CVE-2026-124883 · Runtime
NO FIX YET · SEE WHAT TO DO
A use-after-free bug in Firefox's DOM Core and HTML component lets memory be reused after it is freed. The sources do not state what an attacker can do beyond memory corruption.
first public Nov 10, 2026 · 1 source
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Anyone running a Firefox version older than 160 or ESR older than 153.7 is exposed, and browsing untrusted web pages is the normal path to trigger it. unknown whether the flaw needs a specific configuration.
Not affected if esr-153.7-or-later, firefox-160-or-later
Who cares browser, firefox
firefox --version160 and Firefox ESR 153.7160153.7Use-after-free in the DOM: Core & HTML component. This vulnerability was fixed in Firefox 160 and Firefox ESR 153.7.
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