Live › vulnerability › CVE-2026-117880
Go to dashboardA use-after-free bug in the XML component of Firefox was fixed in Firefox 159 and Firefox ESR 115.44 and 153.6. The sources do not say what an attacker gains beyond the memory corruption that a use-after-free implies.
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 is in scope. The sources do not describe the conditions that trigger the bug, such as whether a malicious web page is enough or whether any XML feature must be used, so unknown.
No product ranges from the sources yet.
firefox --version, and compare it against the fixed releases.115.44 or later on the 115 branch or 153.6 or later on the 153 branch.159 or later, or Firefox ESR to 115.44 or 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 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-2026-117880")
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