Worked on enhancing file upload security and reliability in the dbeaver/cloudbeaver repository, focusing on the WebSQLFileLoaderServlet component. Addressed validation hardening by replacing regex-based forbidden character checks with compiled Pattern-based validation for upload paths and implemented strict UUID validation for file IDs to mitigate path traversal and injection risks. Improved error handling by providing clearer messages for invalid inputs, contributing to better user feedback and maintainability. Utilized Java for backend development, emphasizing API security, file handling, and input validation. These changes resolved blob upload validation issues and strengthened the overall robustness of the file upload pipeline within the project.