Live › vulnerability › CVE-2026-117922
Go to dashboardA use-after-free bug in Firefox's WebSockets networking component can corrupt memory when a page or connection reuses freed memory. The sources do not say what an attacker can get beyond 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 Firefox builds older than the fixed versions, including desktop installs and managed fleets pinned to an ESR branch. The sources do not say which WebSockets usage or configuration triggers the flaw, so the exposure of server-side or non-browser users is unknown.
No product ranges from the sources yet.
firefox --version; affected builds are older than 159, 115.44 ESR, and 153.6 ESR.115 or 153 and compare against the fixed 115.44 or 153.6.159 or later.115.44 or later.153.6 or later.Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Use-after-free in the Networking: WebSockets 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-2026-117922")
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