During April 2025, Noexcs focused on security hardening for the open-webui/open-webui repository, addressing a critical CORS vulnerability in the API layer. Using Python and applying backend development and security best practices, Noexcs implemented a targeted fix to ensure that Access-Control-Allow-Origin does not use a wildcard when credentials are included in cross-origin requests. This change mitigated the risk of credential leakage and improved compliance with security policies, particularly around CSRF exposure. The work was delivered as a single, well-documented commit, enhancing both maintainability and auditability. Noexcs’s contribution demonstrated depth in secure API design and repository-level traceability.