CVE-2026-124871 · Runtime
NO FIX YET · SEE WHAT TO DO
A use-after-free bug in Firefox's DOM HTML Parser component lets memory be reused after it is freed. The sources do not say what an attacker can achieve beyond that.
first public Nov 10, 2026 · 1 source
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Anyone running Firefox older than version 160 is affected, since the flaw is in the browser's HTML parser and is reached by loading web pages. The sources do not say whether a user must visit a malicious page or whether any other setting matters.
Not affected if firefox-160-or-newer
Who cares browser, firefox
160 or newer.160Use-after-free in the DOM: HTML Parser component. This vulnerability was fixed in Firefox 160.
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