Worked on security hardening for the rustfs/rustfs repository, focusing on the console service. Implemented a same-origin policy for CORS to restrict cross-origin requests and introduced fail-closed behavior for Helm credentials, ensuring default credentials are never used in production environments. Added a deny.toml configuration to strengthen dependency management and hardened sample configuration files to enforce secure defaults. Used Rust and YAML to deliver these changes, applying backend development and security best practices throughout the process. Documented the new security controls and completed thorough reviews to support ongoing DevSecOps initiatives and lay the groundwork for future security improvements.