CVE-2026-76960: SAP S/4HANA Finance CSRF Vulnerability

CVE-2026-76960 Overview

CVE-2026-76960 is a Cross-Site Request Forgery (CSRF) vulnerability [CWE-352] in SAP S/4HANA Finance (Advanced Payment Management). The application does not enforce sufficient anti-CSRF protection on certain requests. An attacker with low privileges can craft a malicious link or web page that triggers unintended actions on the SAP web server when an authenticated victim interacts with it. Successful exploitation results in limited impact on confidentiality and integrity, with no impact on availability.

Critical Impact
An authenticated user who visits attacker-controlled content can be coerced into submitting unintended requests to the SAP S/4HANA Advanced Payment Management interface, exposing limited financial data and enabling unauthorized state changes.

Affected Products

SAP S/4HANA Finance (Advanced Payment Management)

Discovery Timeline

2026-09-08 - CVE-2026-76960 published to NVD
2026-09-08 - Last updated in NVD database
2026-09-11 - EPSS score published

Technical Details for CVE-2026-76960

Vulnerability Analysis

The flaw resides in request handling within the Advanced Payment Management component of SAP S/4HANA Finance. Certain state-changing endpoints accept authenticated requests without validating an anti-CSRF token or verifying the request origin. An attacker exploits browser trust: any authenticated user who loads attacker-controlled HTML causes the browser to attach valid session cookies to forged requests.

Exploitation requires an authenticated victim and user interaction, such as clicking a link or loading a page containing a hidden form or image tag. The attacker does not need to intercept traffic or read responses. The impact is limited to actions the victim is authorized to perform, which in the Advanced Payment Management context can include modifying payment-related records visible to that user.

Root Cause

The root cause is missing or insufficient enforcement of a synchronizer token pattern on affected requests. SAP applications typically rely on sap-xhr-token or the X-CSRF-Token header for state-changing operations. On the affected endpoints, the server does not reject requests lacking a valid token, allowing cross-origin forged submissions to succeed.

Attack Vector

The attack is network-based and requires user interaction. An attacker hosts a malicious page containing a form or script that targets a vulnerable SAP endpoint. When an authenticated SAP user visits the page, their browser automatically includes session credentials with the forged request. The server processes the request as legitimate because it originates from an authenticated session and lacks CSRF validation. See the SAP Note #3365276 for vendor-provided technical details.

Detection Methods for CVE-2026-76960

Indicators of Compromise

HTTP requests to Advanced Payment Management endpoints with Referer or Origin headers pointing to untrusted third-party domains.
State-changing POST requests to SAP S/4HANA Finance URIs missing a valid X-CSRF-Token header.
Unexpected payment configuration changes or record modifications correlated with user web-browsing activity.

Detection Strategies

Inspect web application firewall (WAF) and reverse proxy logs for cross-origin requests targeting SAP Fiori and NetWeaver endpoints associated with Advanced Payment Management.
Correlate SAP application audit logs with authentication and browser session telemetry to identify requests that lack the expected user-driven navigation path.
Alert on anomalous sequences where a user session performs sensitive payment operations without prior legitimate navigation events.

Monitoring Recommendations

Enable SAP Security Audit Log (SM19/RSAU_CONFIG) for the Advanced Payment Management transactions and forward events to a centralized SIEM.
Monitor for HTTP 200 responses to state-changing requests that lack CSRF headers across SAP Gateway logs.
Track user-reported anomalies in payment records against session timelines to identify potential CSRF exploitation.

How to Mitigate CVE-2026-76960

Immediate Actions Required

Apply the SAP-provided security patch referenced in SAP Note #3365276.
Review the SAP Security Patch Day advisories for related fixes and cumulative updates.
Restrict administrative and payment-related roles to users who require them, reducing the blast radius of a successful CSRF attack.

Patch Information

SAP addressed the missing CSRF protection through the fix released in SAP Note #3365276. Customers should download the note from the SAP for Me portal and apply the corresponding support package or correction instructions to affected SAP S/4HANA Finance systems.

Workarounds

Enforce strict SameSite=Strict or SameSite=Lax attributes on SAP session cookies where the deployment supports it.
Configure reverse proxies or WAFs to reject state-changing requests to SAP endpoints when Origin or Referer headers do not match the trusted SAP hostname.
Instruct users to log out of SAP sessions when not in use and avoid browsing untrusted sites in the same browser session as SAP applications.

bash

# Example reverse proxy rule (NGINX) to reject cross-origin POSTs to SAP endpoints
location /sap/ {
    if ($request_method = POST) {
        if ($http_origin !~* "^https://sap\.internal\.example\.com$") {
            return 403;
        }
    }
    proxy_pass http://sap_backend;
}