Live › vulnerability › CVE-2026-117939
Go to dashboardFirefox has a use-after-free bug in its XML component, where memory is used after it has been released. The sources do not say what an attacker can do with it beyond that memory-safety flaw.
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 and users running Firefox builds older than the fixed versions are affected. The sources do not say which configurations or content types trigger the bug, so unknown. Systems already on the fixed versions can skip it.
No product ranges from the sources yet.
159, ESR 115.44, and ESR 153.6.159 or later.115.44 (ESR 115 line) or 153.6 (ESR 153 line).Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Use-after-free in the XML 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-2026-117939")
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