JavaScript Engine Vulnerability in Firefox by Mozilla
CVE-2026-8391

Currently unrated

Key Information:

Vendor: Mozilla
Status: Firefox
Vendor: CVE Published:; 12 May 2026

What is CVE-2026-8391?

A vulnerability has been identified in the JavaScript Engine component of Mozilla Firefox, which could potentially allow for unexpected behaviors or security breaches. This issue has been addressed in the update to Firefox version 150.0.3, ensuring enhanced security and stability for users. Users are advised to update their browsers to the latest version to protect against this vulnerability.

Affected Version(s)

Firefox 150.0.3

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2038575

https://www.mozilla.org/security/advisories/mfsa2026-45/

Download the Critical Vulnerability Management Cheat Sheet

Timeline

Vulnerability published
May 12, 2026
Vulnerability Reserved
May 12, 2026

Credit

ggwhyp

CVE-2026-8391 Data

JSON