Worked on enhancing the authentication system for the apache/druid repository by upgrading the pac4j extension to version 5.7.3. This effort focused on improving security by updating dependencies and licenses, directly addressing known CVEs and reducing risks from outdated components. The process involved close coordination with security teams, thorough code reviews, and targeted testing to ensure a stable authentication flow. Utilizing Java and YAML, the developer applied skills in authentication, dependency management, and security remediation. The result was a more robust authentication mechanism that maintained compatibility with existing deployments while strengthening the overall security posture of the project.