A dependency tree is a hierarchical map that outlines all external libraries, modules, or packages a software project relies on to function. Each node in the tree represents a dependency, and its child nodes represent that dependency’s own dependencies. This structure helps developers understand the full scope of software requirements, manage updates, and identify potential vulnerabilities. In cybersecurity, analyzing the dependency tree is crucial for detecting outdated or compromised components that could introduce risks. Automated tools often generate dependency trees to assist in vulnerability management and compliance checks.