CVE-2026-124942 · Runtime
NO FIX YET · SEE WHAT TO DO
Firefox has an invalid pointer bug in its DOM Streams component, which handles streamed web data in the browser. The sources do not say what an attacker gets beyond the memory fault class, so the impact is unconfirmed.
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.
Any user of Firefox or Firefox ESR before the fixed versions, since the flaw sits in the browser's own DOM Streams code and a web page can reach it. Organizations running Firefox ESR on managed desktops are in scope. The sources do not say whether a user has to visit a crafted page.
Not affected if already-updated
Who cares browser, firefox, firefox-esr
firefox --version on the command line.160 on Firefox, or earlier than 153.7 on the ESR line, is affected.160153.7Invalid pointer in the DOM: Streams 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.