ERROR: HTTP 403 Forbidden – CSRF token validation failed

The error "HTTP 403 Forbidden – CSRF token validation failed" typically occurs in SAP Fiori apps, web-based SAP services (like SAP Gateway/OData), or integrated web applications when a Cross-Site Request Forgery (CSRF) protection mechanism detects an invalid or missing token in the client request.

In simple terms, the server is rejecting the request because it cannot verify that the request is legitimate and came from a trusted source — this is part of SAP's security posture to prevent unauthorized actions.

What is CSRF?

Cross-Site Request Forgery (CSRF) is a type of attack where unauthorized commands are transmitted from a user that the web application trusts. To prevent this, SAP and other web frameworks use CSRF tokens — unique, session-based identifiers that must be included in write operations (like POST, PUT, DELETE).

Common Causes of This Error:

• Missing or invalid CSRF token in the request header during a non-GET HTTP call.
• Incorrect sequence of calls: token was not fetched via a GET call before the POST/PUT/DELETE.
• Token expired due to session timeout or idle duration.
• Token not included by frontend framework (like SAPUI5, AJAX, Postman) during data submission.
• Session mismatch when using multiple tabs, devices, or incognito windows.
• SAP Gateway or backend misconfiguration not allowing token retrieval or validation.

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HERE IS TEMPORARY SOLUTION

‍To turn off or disable CSRF token check

SICF path: /sap/opu/odata/sap/zdg_test1_srv

  1. Go to transaction SICF.

  2.Navigate to the ICF node for your service.

        ●  Double-click your servicenode.

         ●  On Service Data Tab > choose > GUI Configuration.

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Enter the followingvalues:

I.Parameter Name: ~CHECK_CSRF_TOKEN

II.Parameter Value: 0/1 (disable/enable)

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