FIREFOX · CVE-2026-124902 · Runtime
NO FIX YET · SEE WHAT TO DO
A race condition in Firefox's Audio/Video component lets a page bypass the same-origin policy, which keeps websites from reading data from other sites. The fix is in Firefox 160, Firefox ESR 115.45 and Firefox ESR 153.7.
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 on a desktop or mobile device. Systems that only use other browsers or sealed managed builds with the fix applied are not affected.
Not affected if already-updated
Who cares browsers, firefox
firefox --version160 on the current branch, below 115.45 on ESR 115, or below 153.7 on ESR 153160115.45153.7Same-origin policy bypass due to race condition in the Audio/Video 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.