CVE-2017-16146: Directory Traversal in mockserve

The vulnerability stems from improper path sanitization when handling user-supplied URLs. While exact code isn't available, the pattern matches common Node.js path traversal vulnerabilities where: 1) Request URLs are directly mapped to filesystem paths 2) No validation prevents directory traversal sequences 3) path.join() or similar methods are used without resolving to absolute paths. The core vulnerable function would be the request handler responsible for converting URL paths to physical file paths, likely using the raw request path with Node's filesystem methods without proper security checks.