Worked on the ClubCedille/Plateforme-Cedille repository to enhance the security of CI/CD workflows by addressing a vulnerability in sandbox request processing. Focused on hardening the request-sandbox.yml workflow, the developer implemented explicit input sanitization for the user-supplied email field to mitigate the risk of command injection attacks. This targeted bug fix improved the reliability and safety of the sandbox flow, ensuring that user input could not be exploited to compromise the platform. Leveraged skills in DevOps, GitHub Actions, and YAML to deliver a security-focused solution, demonstrating a methodical approach to risk reduction and adherence to best practices in workflow automation.