CVE-2026-24316: SAP NetWeaver ABAP SSRF Vulnerability

CVE-2026-24316 Overview

SAP NetWeaver Application Server for ABAP contains a Server-Side Request Forgery (SSRF) vulnerability in an ABAP Report designed for testing purposes. This report allows authenticated users to send HTTP requests to arbitrary internal or external endpoints, potentially exposing sensitive internal services and data. Successful exploitation could enable attackers to interact with internal endpoints that should not be accessible, compromising data confidentiality and integrity within the SAP environment.

Critical Impact
Authenticated attackers can leverage the vulnerable ABAP test report to forge HTTP requests to internal services, potentially accessing sensitive internal APIs, cloud metadata services, or other protected resources within the network perimeter.

Affected Products

SAP NetWeaver Application Server for ABAP

Discovery Timeline

2026-03-10 - CVE-2026-24316 published to NVD
2026-03-11 - Last updated in NVD database

Technical Details for CVE-2026-24316

Vulnerability Analysis

This vulnerability is classified as CWE-918 (Server-Side Request Forgery), a critical web application security flaw where an attacker can induce the server-side application to make HTTP requests to an arbitrary domain of the attacker's choosing. In this case, the SAP NetWeaver Application Server for ABAP includes a test report that was designed for debugging and testing HTTP connectivity but lacks proper input validation and access controls.

The vulnerable ABAP report accepts user-supplied URL parameters without adequate validation, allowing authenticated users to specify arbitrary destination endpoints. The server then initiates HTTP requests to these endpoints using its own network context and privileges, effectively bypassing firewall rules and network segmentation that would normally protect internal services.

Root Cause

The root cause of CVE-2026-24316 lies in insufficient input validation within the ABAP test report. The report was designed to facilitate HTTP connectivity testing during development but was inadvertently left accessible in production environments. The code fails to implement proper URL allowlisting or blocklisting mechanisms, does not validate that requested URLs are within expected domains, and does not restrict access to internal network ranges such as 127.0.0.1, 169.254.169.254 (cloud metadata services), or private IP ranges.

Attack Vector

The attack vector requires network access and low-privilege authentication to the SAP NetWeaver system. An attacker who has obtained valid credentials (even with minimal privileges) can access the vulnerable ABAP report through the SAP GUI or web interface. By manipulating the URL parameter within the report, the attacker can:

Probe internal network services - Enumerate internal hosts and services that are not directly accessible from external networks
Access cloud metadata endpoints - On cloud-hosted SAP instances, reach cloud provider metadata services (e.g., http://169.254.169.254/) to extract credentials and configuration
Interact with internal APIs - Send requests to internal REST APIs, potentially triggering unintended actions or extracting sensitive data
Bypass network segmentation - Use the SAP server as a proxy to reach otherwise isolated network segments

The attack leverages the trust relationship that internal services have with the SAP application server, allowing requests that would be blocked if initiated from an external source.

Detection Methods for CVE-2026-24316

Indicators of Compromise

Unusual HTTP requests originating from SAP application servers to internal IP ranges or cloud metadata endpoints
Access logs showing execution of the vulnerable ABAP test report by unexpected users
Network traffic from SAP servers to uncommon external domains or IP addresses
Error logs indicating failed connection attempts to internal services from the ABAP layer

Detection Strategies

Monitor SAP Security Audit Log (SM21) for executions of test reports or debugging utilities
Implement network-level monitoring for outbound connections from SAP application servers to detect anomalous destination patterns
Configure SIEM rules to alert on HTTP requests from SAP servers to RFC 1918 private addresses, loopback addresses, or cloud metadata IPs
Review SAP transaction ST01 traces for suspicious HTTP client activity

Monitoring Recommendations

Enable enhanced logging for HTTP client operations within the ABAP stack
Deploy network detection rules for SSRF patterns targeting common internal services and cloud metadata endpoints
Establish baseline network behavior for SAP servers and alert on deviations
Monitor user activity logs for access to development and test transactions in production systems

How to Mitigate CVE-2026-24316

Immediate Actions Required

Apply the security patch referenced in SAP Note #3689080 immediately
Restrict access to the vulnerable ABAP test report using SAP authorization objects
Review and remove unnecessary test reports and development utilities from production systems
Implement network-level controls to restrict outbound HTTP requests from SAP application servers

Patch Information

SAP has released an official security patch addressing this vulnerability. System administrators should apply the fix documented in SAP Note #3689080. The patch implements proper input validation and URL allowlisting to prevent arbitrary endpoint access. Additional details are available on the SAP Security Patch Day Update page.

Workarounds

Disable or restrict access to the vulnerable ABAP test report using authorization object controls until the patch can be applied
Implement network egress filtering on SAP application servers to block connections to internal IP ranges and cloud metadata services
Configure web application firewall (WAF) rules to detect and block SSRF patterns in requests to SAP systems
Conduct an access review to ensure only authorized personnel have access to development and testing utilities in production environments

bash

# SAP authorization restriction example
# Restrict access to test reports using authorization object S_DEVELOP
# Configure in transaction SU24/PFCG to limit report execution to authorized users only
# Review transaction code assignments and ensure test utilities are not assigned to production roles