Description

SAP S/4HANA (Manage Bank Chains app) does not perform sufficient authorization checks within certain affected functionality. An attacker with low privileges could send specially crafted requests to delete specific entries that should not be accessible to them. This results in a low impact on availability. There is no impact on confidentiality and integrity.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "4.3",
  "pubDate": "2026-09-08T01:17:54.917Z",
  "pubdate": "2026-09-08T01:17:54.917Z",
  "executiveSummary": "The vulnerability identified in the SAP S/4HANA 'Manage Bank Chains' application involves an improper authorization check, categorized as an access control flaw. This security deficit allows an authenticated attacker with low-level privileges to perform unauthorized delete operations on specific system entries. While the vulnerability does not compromise the confidentiality or integrity of the underlying data, it poses a direct risk to service availability by enabling the deletion of functional configuration data. Exploitation of this flaw requires a valid user session, though the attacker does not need high-level administrative access to trigger the unauthorized request. The risk is primarily operational, as the intentional removal of bank chain configurations by unauthorized entities can lead to service disruptions within the financial management modules of the S/4HANA environment.",
  "technicalDetails": "The vulnerability resides within the authorization logic of the 'Manage Bank Chains' application in SAP S/4HANA. The root cause is an insufficient validation mechanism during the processing of delete requests for bank chain records. Although the system verifies the user's initial access to the application, it fails to perform a secondary, granular authorization check (typically implemented via an AUTHORITY-CHECK call or a similar mechanism) against the specific object or entry being targeted by the delete command.\nThe exploitation flow begins when an attacker, possessing standard low-level user credentials, navigates to the 'Manage Bank Chains' app. The attacker identifies the API endpoints or UI-driven functions responsible for the deletion of specific bank chain entries. By intercepting the communication request or crafting a direct HTTP request to the backend function, the attacker submits a payload targeting an entry ID for which they lack the appropriate authorization. Because the application logic fails to re-validate the user's authorization against the specific entry prior to executing the delete operation in the database, the backend processes the request as if it originated from a privileged user.\nFrom a technical perspective, the application backend fails to enforce the 'Principle of Least Privilege' at the data object level. The service component responsible for executing the deletion logic relies on the context of the user session without verifying the mapping between the user's current security context and the target record's access control list (ACL) or organizational assignment. Consequently, the database transaction is committed successfully, resulting in the permanent removal of the record.\nThe impact of this vulnerability is limited strictly to the availability of the data within the Manage Bank Chains app. Since the vulnerability relates to an object deletion, it directly correlates to the destruction of state, preventing legitimate processes from accessing necessary banking configurations. Because the vulnerability does not allow for unauthorized reading or modification of existing entries, there is no impact on confidentiality or system integrity. The attack vector is exclusively network-based, utilizing standard protocols used by the SAP Fiori or SAP GUI for HTML interface, requiring the attacker to be successfully authenticated into the SAP S/4HANA environment."
}