Volerion logoVolerion
Volerion logoVolerion

Mozilla Firefox and Thunderbird Invalid Pointer Vulnerability in the JavaScript Engine Component

Vulnerability

A vulnerability has been identified in the JavaScript Engine component of Mozilla Firefox and Thunderbird. This issue involves an invalid pointer, which can potentially lead to memory corruption. The vulnerability affects Firefox versions prior to 148, Firefox ESR versions prior to 140.8, Thunderbird versions prior to 148, and Thunderbird ESR versions prior to 140.8.

Impact

Exploitation of this vulnerability could lead to memory corruption, with evidence suggesting that such corruption could be leveraged to execute arbitrary code.

Remediation

Users can upgrade to Firefox 148, Firefox ESR 140.8, Thunderbird 148, or Thunderbird ESR 140.8 to address this vulnerability.

Added: Feb 24, 2026, 2:42 PM
Updated: Feb 24, 2026, 10:43 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
2.5
exploitability
4.4
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.