Live › vulnerability › CVE-2026-117949
Go to dashboardA use-after-free bug in the DOM Core and HTML component of Firefox was fixed in Firefox 159 and Firefox ESR 115.44 and 153.6. Sources do not say what an attacker can do with it beyond the memory corruption class.
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 on a version before the fixed releases, including managed desktop fleets. Sources do not say whether server-side or embedded uses are affected, so unknown for those.
No product ranges from the sources yet.
firefox --version159, 115.44 and 153.6, unknown for other branches159 or later115.44 or 153.6, whichever branch is in useEach row is the first time that source carried this signal. The analyst’s rows are its own findings.
Use-after-free in the DOM: Core & HTML 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-2026-117949")
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