CVE-2026-76959 in S4HANA
Summary
by MITRE • 09/08/2026
SAP S/4HANA Finance (Advanced Payment Management) does not perform sufficient Cross-Site Request Forgery protection on certain requests due to this an attacker with low privileges could craft a malicious link or page. If an authenticated victim interacts with it, unintended actions could be triggered on the web server on their behalf. This results in a low impact on confidentiality and integrity. There is no impact on availability.
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Analysis
by VulDB Data Team • 09/08/2026
The vulnerability identified within SAP S/4HANA Finance Advanced Payment Management represents a classic Cross-Site Request Forgery (CSRF) flaw, rooted in the application's failure to adequately validate the origin of incoming HTTP requests. In web security architecture, CSRF attacks exploit the trust that a web site has in a user's browser, particularly when that browser is authenticated with active session cookies or tokens. The specific defect lies in the lack of sufficient protective mechanisms on certain API endpoints and transactional pages responsible for financial operations. Without robust verification techniques such as synchronizer token patterns, double-submit cookie strategies, or strict SameSite attribute enforcement on session cookies, the application cannot distinguish between a legitimate user-initiated action and a maliciously crafted request triggered by an external actor. This architectural oversight allows attackers to bypass standard authentication checks because the browser automatically attaches valid credentials to any request sent from a different domain if the victim is currently logged into the SAP system.
The operational impact of this vulnerability is primarily centered on integrity rather than confidentiality or availability, as noted in the initial assessment. An attacker with low privileges can construct a malicious webpage or embed a deceptive link containing specially crafted HTTP requests targeting vulnerable endpoints within the Advanced Payment Management module. When an authenticated victim interacts with this content, whether through accidental clicking or social engineering tactics that induce automatic request submission via image tags or form submissions, the web server processes these actions as if they originated from the victim's legitimate session. This capability enables unauthorized modifications to financial data, such as altering payment instructions, changing beneficiary bank details, or initiating payments without proper authorization workflows. While the immediate impact is classified as low due to potential limitations in scope or value of affected transactions, the integrity compromise poses significant risk for organizations relying on automated and precise financial processing systems where even minor alterations can lead to substantial monetary loss or compliance violations.
From a standards perspective, this vulnerability aligns with CWE-352: Cross-Site Request Forgery (CSRF), which describes the failure of an application to verify that a request was intentionally made by the user. In terms of adversary tactics, this technique corresponds to MITRE ATT&CK Tactic TA0001 Initial Access and specifically Technique T1566 Phishing or potentially T1078 Valid Accounts if combined with credential theft, though in pure CSRF scenarios it often falls under lateral movement or privilege escalation contexts depending on the victim's role. The exploitation vector is typically classified as Remote (Network) with Low Complexity requirements for the attacker, provided that social engineering elements are employed to induce user interaction. To mitigate this risk effectively, SAP and system administrators must implement strict anti-CSRF controls across all state-changing endpoints. This includes deploying unique per-session CSRF tokens that are validated server-side before processing any modification requests, ensuring that sensitive operations require explicit confirmation steps such as multi-factor authentication or secondary password entry for high-value transactions. Additionally, configuring HTTP headers like SameSite=Strict or Lax on session cookies can prevent browsers from sending credentials in cross-site contexts, thereby neutralizing the primary mechanism used by CSRF attacks without requiring extensive code changes to every individual endpoint.