Live › vulnerability › CVE-2026-117931
Go to dashboardA use-after-free bug in Firefox's DOM Events component lets memory be reused after it is freed. Sources do not say what an attacker can get from it, beyond that it was fixed in Firefox 159 and ESR 115.44 and 153.6.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-27 14:32 UTC. All times on this page are UTC.
Anyone running Firefox or Firefox ESR builds older than the fixed versions, on desktops or in managed fleets. Sources do not say whether a specific page, setting or feature is needed to trigger the flaw, so the exposure path is unknown.
No product ranges from the sources yet.
firefox --version159 or later115.44 or 153.6Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Use-after-free in the DOM: Events component. This vulnerability was fixed in Firefox 159, Firefox ESR 115.44, and Firefox ESR 153.6.
This page as .md · .json · in your agent: get_signal("CVE-2026-117931")
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