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Mozilla Firefox Use-After-Free Vulnerability in the JavaScript Engine Component

Vulnerability

A use-after-free vulnerability has been identified in the JavaScript engine of Mozilla Firefox. This issue affects Firefox versions prior to 149. The vulnerability arises from improper memory management, which can potentially be exploited to manipulate memory in a way that leads to unintended behavior.

Impact

Exploitation of this vulnerability creates a use-after-free condition, which can commonly be leveraged to execute arbitrary code or cause a crash.

Remediation

Users can upgrade to Firefox 149 to address this vulnerability.

Added: Mar 24, 2026, 1:26 PM
Updated: Mar 24, 2026, 1:26 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
0.6
exploitability
4.2
remediation
7.7
relevance
4.6
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.