Live › vulnerability › CVE-2026-117973
Go to dashboardA use-after-free flaw in Firefox's DNS networking component lets memory be reused after it is freed. The sources do not say what an attacker can do beyond that, so the reach and the impact are not confirmed.
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 older than the fixed versions on desktop or managed machines. Installs already on or or later are not affected by this flaw. The sources do not say whether the bug needs a specific setting or a crafted page to trigger.
159153.6No product ranges from the sources yet.
firefox --version or check Help > About Firefox and compare with 159 or 153.6153.6159 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 Networking: DNS component. This vulnerability was fixed in Firefox 159 and Firefox ESR 153.6.
This page as .md · .json · in your agent: get_signal("CVE-2026-117973")
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