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Mozilla Firefox Sandbox Escape Vulnerability Due to Integer Overflow in the Graphics: Canvas2D Component

Vulnerability

A vulnerability allowing sandbox escape has been identified in Mozilla Firefox versions prior to 143.0.3. This issue arises from an integer overflow in the Graphics: Canvas2D component, which could potentially be exploited to escape the browser's security sandbox.

Impact

Exploitation of this vulnerability allows for a sandbox escape, which could lead to unauthorized access or actions outside of the intended security boundaries of the browser.

Remediation

Users can upgrade to Firefox version 143.0.3 to address this vulnerability.

Added: Sep 30, 2025, 1:17 PM
Updated: Sep 30, 2025, 1:17 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
2.5
exploitability
4.4
remediation
7.7
relevance
0.6
threat
0.0
urgency
2.9
incentive
0.8

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