Live › vulnerability › CVE-2026-117976
Go to dashboardA site isolation issue in the DOM Navigation component of Firefox was fixed in Firefox 159 and Firefox ESR 153.6. The sources do not say what an attacker can read or run through it.
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 whose staff or systems run Firefox builds older than 159 or ESR older than 153.6 are likely exposed. The sources do not say which configurations or content are needed to trigger it, so unknown whether managed or kiosk setups differ.
No product ranges from the sources yet.
firefox --version, and compare it with 159 and 153.6.159 or later, or Firefox ESR to 153.6 or later.Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Site isolation issue in the DOM: Navigation component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6.
This page as .md · .json · in your agent: get_signal("CVE-2026-117976")
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