The vulnerability description explicitly states that affected versions resolve relative paths insecurely. While no specific code is available, the pattern matches classic path traversal vulnerabilities where user-controlled input (URL path) is directly used to construct filesystem paths without: 1) normalization, 2) checking if the resolved path remains within the intended root directory. The example attack using '/../../../../etc/passwd' confirms this pattern. In Node.js servers, this would typically occur in the core request handler responsible for serving static files, where path.join() or similar methods are used without subsequent containment checks.