Memory leaks may cause a system to slow down or crash. If an attacker can intentionally trigger a memory leak, the attacker may be able to launch a denial-of-service attack or take advantage of other unexpected program behavior. JavaScript memory leaks are tricky and often time-consuming to identify and fix, as JavaScript is dynamically typed and leaks are fundamentally different from leaks in traditional C, C++, and Java programs. It is a daunting task even for experienced expert developers to effectively identify and fix memory leaks. Our team worked with Adobe to build NLeak, a memory detection tool to automate companies’ attempts to locate, diagnose, and rank JavaScript memory leaks in Node.js applications.