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Mozilla Firefox and Thunderbird Incorrect Boundary Conditions in WebAssembly Component Vulnerability

Vulnerability

A vulnerability exists in the JavaScript: WebAssembly component of Mozilla Firefox and Thunderbird, specifically in versions prior to 148. This issue arises from incorrect boundary conditions, which could potentially be exploited.

Impact

Exploitation of this vulnerability could lead to a sandbox escape, allowing malicious scripts to interact with the host environment or application in unintended ways.

Remediation

Users can upgrade to Firefox or Thunderbird version 148 to address this vulnerability.

Added: Feb 24, 2026, 2:31 PM
Updated: Feb 24, 2026, 10:33 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
1.9
exploitability
4.2
remediation
7.7
relevance
3.1
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.