How To Fix /IWNGW/CM_HUB036 - CSRF token not found

SAP Error Message - Details

• Message type: E = Error

• Message class: /IWNGW/CM_HUB -

• Message number: 036

• Message text: CSRF token not found

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message /IWNGW/CM_HUB036 - CSRF token not found ?

  The SAP error message /IWNGW/CM_HUB036 CSRF token not found typically occurs in the context of SAP Gateway services, particularly when dealing with OData services. CSRF (Cross-Site Request Forgery) tokens are used to protect against unauthorized commands being sent from a user’s browser. When this error appears, it indicates that the CSRF token required for the request is missing or not being sent correctly.
  Causes:
  
  Missing CSRF Token: The client application did not send a CSRF token with the request.
  Expired CSRF Token: The CSRF token may have expired if it was generated earlier and the session has been idle for too long.
  Incorrect Configuration: The SAP Gateway or the OData service may not be configured correctly to handle CSRF tokens.
  Client-Side Issues: The client application (like a web app or mobile app) may not be correctly handling the CSRF token, either not retrieving it or not sending it with requests.
  
  Solutions:
  
  
  Retrieve and Send CSRF Token:
  
  Ensure that your client application retrieves the CSRF token before making any state-changing requests (like POST, PUT, DELETE).
  You can retrieve the CSRF token by making a GET request to the OData service endpoint. The token is usually included in the response headers (look for x-csrf-token).
  Include the retrieved CSRF token in the headers of subsequent requests:
  X-CSRF-Token: <token_value>
  
  
  
  
  Check Session Management:
  
  Ensure that the session is active and that the CSRF token has not expired. If it has, retrieve a new token.
  
  
  
  Review Client Code:
  
  If you are using a custom client application, review the code to ensure that it correctly handles CSRF tokens. Make sure it retrieves the token and includes it in the headers of requests that modify data.
  
  
  
  SAP Gateway Configuration:
  
  Check the configuration of the SAP Gateway and the OData service to ensure that CSRF protection is enabled and correctly set up.
  
  
  
  Testing with Tools:
  
  Use tools like Postman or SAP Gateway Client to manually test the service and see if you can reproduce the error. This can help isolate whether the issue is with the client application or the service itself.
  
  
  
  Related Information:
  
  SAP Documentation: Refer to the official SAP documentation for details on CSRF protection in SAP Gateway and OData services.
  SAP Notes: Check for any relevant SAP Notes that might address known issues or provide patches related to CSRF token handling.
  Debugging: If you have access to the backend, consider enabling debugging to trace the request and see where the token handling might be failing.
  
  By following these steps, you should be able to resolve the /IWNGW/CM_HUB036 CSRF token not found error and ensure that your application can successfully interact with SAP Gateway services.