CVE-2026-124919 · Runtime
NO FIX YET · SEE WHAT TO DO
A use-after-free bug in Firefox's WebRTC networking component lets malicious code cause memory to be reused unsafely. An attacker can use this to escalate privileges inside the browser.
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 build older than 160 or Firefox ESR older than 153.7. The bug sits in WebRTC networking, so exposure is highest where calls or media features are used, but the sources do not say whether WebRTC must be actively in use. Managed desktops should be checked against their Firefox ESR pin.
Not affected if firefox-160-or-later, firefox-esr-153.7-or-later
Who cares browsers, firefox, firefox-esr, webrtc
firefox --version on Linux.160 for Firefox or below 153.7 for Firefox ESR.160 or later.153.7 or later.Privilege escalation due to use-after-free in the WebRTC: Networking component. This vulnerability was fixed in Firefox 160 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.