Live › vulnerability › CVE-2026-117872
Go to dashboardA use-after-free bug in the JavaScript Standard Library component of Firefox frees memory that is still referenced, which can corrupt memory. The sources do not say what an attacker can achieve beyond that, such as code execution.
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 desktop or in managed fleets that pin ESR releases. Teams that do not run Firefox in their environment can skip it. Whether a web page can trigger the flaw without user action is unknown from the sources.
No product ranges from the sources yet.
firefox --version (or check Help > About Firefox) and compare against the fixed releases listed below159 or later115.44 or later153.6 or laterEach row is the first time that source carried this signal. The analyst’s rows are its own findings.
Use-after-free in the JavaScript: Standard Library 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-2026-117872")
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