Live › vulnerability › CVE-2026-117870
Go to dashboardA use-after-free bug in the JavaScript Engine component of Firefox was fixed in Firefox 159, Firefox ESR 115.44, and Firefox ESR 153.6. The sources do not state 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.
Teams and users running Firefox or Firefox ESR builds older than the fixed versions. The sources do not say whether server-side or embedded uses of the JavaScript engine are exposed, so unknown for those.
No product ranges from the sources yet.
firefox --version.159, 115.44, and 153.6.159 or later.115.44 or 153.6 on the ESR branch in use.Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Use-after-free in the JavaScript Engine 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-2026-117870")
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