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Mozilla Firefox and Firefox ESR Memory Safety Vulnerability Allowing Potential Arbitrary Code Execution

Vulnerability

A vulnerability has been identified in Mozilla Firefox versions 150 and in Firefox ESR 140.10. This vulnerability arises from memory safety issues that could lead to memory corruption. With sufficient effort, these issues might have been exploited to execute arbitrary code.

Impact

Exploitation of this vulnerability could have allowed for arbitrary code execution.

Remediation

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

Added: May 19, 2026, 2:28 PM
Updated: May 19, 2026, 2:28 PM

Vulnerability Rating

Custom Algorithm
spread
7.8
impact
7.5
exploitability
3.6
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.