JavaScript Engine Vulnerability in Firefox by Mozilla
CVE-2026-6779

Currently unrated

Key Information:

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

What is CVE-2026-6779?

A security issue was identified within the JavaScript Engine component of Firefox, which could potentially expose the application to various risks. This vulnerability was effectively addressed in version 150 of Firefox, reinforcing the importance of maintaining updated software to safeguard user data and enhance overall browser security.

Affected Version(s)

Firefox 150

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2023343

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

Gary Kwong

CVE-2026-6779 Data

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