During December 2024, Shubham Saboo focused on strengthening the security of zip file extraction workflows in the Shubhamsaboo/markitdown repository. He addressed a critical vulnerability by implementing path traversal prevention in the ZipConverter, ensuring that extracted files remain confined within the intended directory. Using Python and applying back end development and security best practices, Shubham validated file paths and enhanced error handling to provide clearer feedback for invalid zip files. His work demonstrated a careful, defensive approach to secure file processing, addressing a nuanced bug and improving the reliability of extraction routines through targeted, well-documented code changes and actionable commit messages.