CVE-2026-124881 · Package
NO FIX YET · SEE WHAT TO DO
A use-after-free bug in Firefox's CSS parsing and computation code can be triggered by crafted web content. The sources do not say what an attacker can do beyond that, but memory corruption of this kind can lead to code execution.
first public Nov 10, 2026 · 1 source
Could this affect your app?
Free first check from your website. Connect your repo for the full answer.
Anyone running Firefox or Firefox ESR older than the fixed versions. Browsing untrusted pages is the path in; the sources do not describe any server-side exposure.
Not affected if already-on-fixed-version
Who cares browser, desktop, firefox
160, Firefox ESR 115.45, Firefox ESR 153.7.160 or later.115.45 or later.153.7 or later.Use-after-free in the CSS Parsing and Computation component. This vulnerability was fixed in Firefox 160, Firefox ESR 115.45, and Firefox ESR 153.7.
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.
Check it with your coding agent
It reads this page and tells you if your code is affected.
Are you affected?
Ask from here. InfraStack checks the affected versions against your stack and answers in your inbox.
InfraStack checks the affected versions against your stack and answers in Slack, with the evidence and the fix.