How To Fix SG818 - Validation failed for &1. Directory traversal in parameters.

SAP Error Message - Details

• Message type: E = Error

• Message class: SG - Global Pool for Cross-Application Developments

• Message number: 818

• Message text: Validation failed for &1. Directory traversal in parameters.

Self-Explanatory Message

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Smart SAP Assistant

• What is the cause and solution for SAP error message SG818 - Validation failed for &1. Directory traversal in parameters. ?

  The SAP error message SG818, which states "Validation failed for &1. Directory traversal in parameters," typically indicates that there is an issue with the input parameters being passed to a function or transaction in SAP. This error is related to security measures that prevent directory traversal attacks, which can occur when an application allows users to access files or directories outside of the intended directory structure.
  Cause:
  
  Directory Traversal Attempt: The error is triggered when the input parameters contain sequences that attempt to navigate the directory structure (e.g., using ../ to move up directories).
  Invalid Input: The parameters being passed may contain invalid characters or patterns that are not allowed by the system for security reasons.
  Configuration Issues: There may be misconfigurations in the application or system settings that lead to this validation failure.
  
  Solution:
  
  Check Input Parameters: Review the input parameters being passed to the function or transaction. Ensure that they do not contain any directory traversal patterns (like ../).
  Sanitize Input: Implement input validation and sanitization to ensure that only valid and expected values are accepted. This can include stripping out or encoding special characters.
  Review Code: If you have access to the code, check for any areas where user input is being processed and ensure that proper validation is in place.
  Consult Documentation: Refer to SAP documentation or notes related to the specific transaction or function module to understand the expected input format.
  Security Settings: Review the security settings of your SAP system to ensure they are configured correctly to prevent such errors while still maintaining security.
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that may address this specific error or provide guidance on handling input validation.
  SAP Community: Engage with the SAP Community forums to see if other users have encountered similar issues and what solutions they have found.
  Testing: After making changes, thoroughly test the application to ensure that the error is resolved and that no new issues have been introduced.
  
  By following these steps, you should be able to identify the cause of the SG818 error and implement a solution to resolve it.