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Mozilla Firefox Memory Safety Vulnerability Allowing Potential Arbitrary Code Execution

Vulnerability

A vulnerability has been identified in Mozilla Firefox and Firefox ESR versions 115.35, 140.10, and 150, related to memory safety. Some of these memory safety issues showed signs of memory corruption, and it is presumed that, with sufficient effort, they could have been exploited to execute arbitrary code.

Impact

Exploitation of this vulnerability could lead to arbitrary code execution.

Remediation

Users can upgrade to Firefox 151, Firefox ESR 115.36, or Firefox ESR 140.11 to address this vulnerability.

Added: May 19, 2026, 2:29 PM
Updated: May 19, 2026, 2:29 PM

Vulnerability Rating

Custom Algorithm
spread
7.8
impact
5.0
exploitability
3.8
remediation
7.7
relevance
8.8
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.