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Mozilla Firefox JIT Miscompilation Vulnerability in JavaScript Engine

Vulnerability

A JIT miscompilation vulnerability has been identified in the JavaScript engine of Mozilla Firefox. This issue can lead to incorrect execution of JavaScript code, potentially allowing for exploitation in certain scenarios. The vulnerability affects Firefox versions prior to 151.0.3.

Impact

Exploitation of this vulnerability could lead to JIT miscompilation, allowing for potential code execution or other unintended behavior in the JavaScript engine.

Remediation

Users can upgrade to Firefox 151.0.3 to address this vulnerability.

Added: Jun 2, 2026, 8:39 PM
Updated: Jun 2, 2026, 8:39 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
0.6
exploitability
4.2
remediation
7.7
relevance
9.8
threat
0.0
urgency
2.9
incentive
0.0

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.