CVE-2017-16154: Directory Traversal in earlybird

The vulnerability stems from improper path resolution when handling user-controlled input. While the exact code isn't available, the pattern matches common path traversal vulnerabilities where: 1) User-supplied paths (URLs) are directly concatenated with a base directory 2) No validation checks for path traversal sequences ('../') 3) No use of secure path resolution methods (like path.resolve with proper base constraints). The high confidence comes from the vulnerability description explicitly stating the package resolves relative paths insecurely, and the PoC showing classic traversal payloads in URLs.