CVE-2026-124857 · Runtime
NO FIX YET · SEE WHAT TO DO
A use-after-free bug in Firefox's Canvas2D graphics component lets memory be reused after it is freed. The sources do not state what an attacker can do beyond that, so the impact is not confirmed.
first public Nov 10, 2026 · 1 source
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Anyone running a Firefox release older than the fixed versions is exposed, since the flaw is in the browser's own graphics code. The sources do not say whether a web page alone can trigger it. unknown
Not affected if already-on-fixed-version
Who cares browsers, firefox
firefox --version, and compare it against the fixed releases.115.45 or 153.7.160115.45153.7Use-after-free in the Graphics: Canvas2D component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, and Firefox ESR 153.7.
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