FIREFOX · CVE-2026-124898 · Runtime
NO FIX YET · SEE WHAT TO DO
A memory-safety bug (use-after-free) in Firefox's DOM Editor component lets freed memory be reused, which can crash the browser or be abused to run attacker code. The sources do not say how it is triggered or what an attacker can achieve beyond that.
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 a Firefox version older than the fixed releases named in the sources. The sources do not say whether specific page content or settings are needed to trigger the flaw.
Not affected if firefox-160-or-later
Who cares browsers, firefox
firefox --version on the command line160, 115.45 (ESR), 153.7 (ESR)160115.45153.7Use-after-free in the DOM: Editor 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.