Live › vulnerability › CVE-2026-117906
Go to dashboardA use-after-free bug in Firefox's CSS parsing and computation component reuses memory after it has been freed. Mozilla fixed it in Firefox 159 and Firefox ESR 115.44 and 153.6, and the sources do not say what an attacker can do beyond that.
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 a Firefox build older than 159 or an ESR build older than 115.44 or 153.6 is exposed, most likely by opening a web page that triggers the CSS code path. Servers and build pipelines that do not run a browser are unlikely to be affected. The sources do not say whether the flaw is reachable without user interaction.
No product ranges from the sources yet.
firefox --version (or check About Firefox) and compare against 159 or the ESR builds 115.44 and 153.6.159 or later.115.44 or 153.6, depending on which ESR branch is in use.Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Use-after-free in the CSS Parsing and Computation 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-2026-117906")
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