Mozilla Firefox Mitigation Bypass Vulnerability in the DOM: postMessage Component

Vulnerability

A mitigation bypass vulnerability has been identified in the DOM: postMessage component of Mozilla Firefox. This vulnerability allows for the circumvention of existing security measures, potentially leading to unintended behavior or exploitation. It affects Firefox versions prior to 150.

Impact

Exploitation of this vulnerability could lead to the bypassing of security mitigations, allowing for potential exploitation of other vulnerabilities or unintended behavior in the application.

Remediation

Users can upgrade to Firefox 150 to address this vulnerability.

Added: Apr 21, 2026, 3:04 PM
Updated: Apr 21, 2026, 3:04 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
2.5
exploitability
4.4
remediation
7.7
relevance
6.4
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.