Volerion logoVolerion
Volerion logoVolerion

Mozilla Firefox and Firefox ESR Use-After-Free Vulnerability in the Widget: Cocoa Component

Vulnerability

A use-after-free vulnerability has been identified in the Widget: Cocoa component of Mozilla Firefox. This issue allows for potential memory corruption, which could be exploited to execute arbitrary code. The vulnerability affects Firefox versions prior to 150 and Firefox ESR versions prior to 140.10.

Impact

Exploitation of this vulnerability could lead to memory corruption, with evidence suggesting it could be used to execute arbitrary code.

Remediation

Users can upgrade to Firefox 150 or Firefox ESR 140.10 to address this vulnerability.

Added: Apr 21, 2026, 2:10 PM
Updated: Apr 21, 2026, 2:10 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
0.6
exploitability
4.0
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.