DNS Component Vulnerability in Firefox by Mozilla
CVE-2026-6777

Currently unrated

Key Information:

Vendor: Mozilla
Status: Firefox
Vendor: CVE Published:; 21 April 2026

What is CVE-2026-6777?

A vulnerability has been identified in the Networking: DNS component of Mozilla Firefox. This flaw could potentially be exploited to affect the DNS resolution process. Users are strongly advised to update to Firefox version 150, where this issue has been resolved. Keeping your browser up to date is essential for maintaining security and protecting against potential exploitation of this vulnerability.

Affected Version(s)

Firefox 150

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2022726

https://www.mozilla.org/security/advisories/mfsa2026-30/

Download the Critical Vulnerability Management Cheat Sheet

Timeline

Vulnerability published
Apr 21, 2026
Vulnerability Reserved
Apr 21, 2026

Credit

b00rito

CVE-2026-6777 Data

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