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Mozilla Firefox and Thunderbird Memory Safety Vulnerability Allowing Arbitrary Code Execution

Vulnerability

A vulnerability exists in Mozilla Firefox and Thunderbird versions 149, related to memory safety. Some of these memory safety bugs indicated potential memory corruption, which could have been exploited to execute arbitrary code with sufficient effort. This vulnerability has been addressed in Firefox and Thunderbird version 150.

Impact

Exploitation of this vulnerability could lead to arbitrary code execution.

Remediation

Users can upgrade to Firefox or Thunderbird version 150 to address this vulnerability.

Added: Apr 21, 2026, 2:53 PM
Updated: Apr 21, 2026, 2:53 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
7.5
exploitability
3.6
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.