Live › vulnerability › CVE-2026-117883
Go to dashboardA use-after-free bug in the DOM HTML Parser component of Firefox lets memory be reused after it is freed. Sources do not say what an attacker can achieve with it beyond the general risk of memory corruption.
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 a Firefox build older than the fixed versions, including ESR branches, on desktop or other platforms. Sources do not describe a server-side exposure, so unknown whether any hosted or managed setup is involved.
No product ranges from the sources yet.
about:support or the Help menu and compare it to the fixed releases115.44 and 153.6159 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 DOM: HTML Parser 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-2026-117883")
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