FIREFOX · CVE-2026-124901 · Runtime
NO FIX YET · SEE WHAT TO DO
A flaw in the Networking: JAR component of Firefox was fixed in Firefox 160, Firefox ESR 115.45 and Firefox ESR 153.7. The sources do not describe what an attacker can do with it.
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 older than the fixed versions is in scope, since the flaw sits in the browser's networking code. The sources do not say what input triggers it or whether a web page alone is enough. Users already on the fixed versions are not affected.
Not affected if already-on-fixed-version
Who cares browser, firefox
firefox --version160, 115.45 (ESR) and 153.7 (ESR)160115.45 and 153.7Other issue in the Networking: JAR 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.