Cross-Origin Resource Sharing (CORS)

Cross-Origin Resource Sharing (CORS) is a browser security mechanism that controls how web applications running at one origin can request resources from a different origin, enforcing the same-origin policy. ABAP and SAPUI5 developers encounter CORS when a request from a web front-end is blocked because the target server has not explicitly permitted cross-origin access. Server security configuration in SAPUI5 covers CORS alongside related topics such as clickjacking protection, and developers must ensure the appropriate server-side headers or allowlist entries are in place to allow legitimate cross-origin requests to succeed.