CVE-2026-34261: SAP Business Analytics Auth Bypass Flaw

CVE-2026-34261 Overview

CVE-2026-34261 is a missing authorization check vulnerability affecting SAP Business Analytics and SAP Content Management. An authenticated user can invoke certain Remote Function Call (RFC) modules without the required permission checks. Successful exploitation allows the attacker to read sensitive information that should be inaccessible to their assigned role. The flaw maps to [CWE-862] Missing Authorization. The issue impacts confidentiality only, with no effect on integrity or availability. SAP addressed the issue through SAP Note 3705094 and released remediation guidance on SAP Security Patch Day.

Critical Impact
Authenticated low-privileged users can call protected RFC modules in SAP Business Analytics and SAP Content Management to obtain sensitive data outside their authorization scope.

Affected Products

SAP Business Analytics
SAP Content Management
Remote Function Modules exposed by the affected SAP components

Discovery Timeline

2026-04-14 - CVE-2026-34261 published to the National Vulnerability Database (NVD)
2026-04-17 - Last updated in the NVD database

Technical Details for CVE-2026-34261

Vulnerability Analysis

The vulnerability resides in specific Remote Function Call (RFC) modules exposed by SAP Business Analytics and SAP Content Management. These modules do not enforce the authorization checks required before executing privileged operations. An authenticated user with valid SAP credentials can call the affected function modules directly over the network. The server processes the request and returns data without validating whether the caller holds the required role or authorization object. This results in unauthorized disclosure of business data, configuration values, or other content stored in the affected components.

Root Cause

The root cause is a missing authorization check ([CWE-862]) inside selected RFC function modules. SAP applications typically gate sensitive operations through AUTHORITY-CHECK statements against authorization objects. In the vulnerable modules, this check is absent or incomplete, so the runtime never validates the caller's permissions before returning data. Any session that completes initial logon can therefore reach restricted functionality.

Attack Vector

The attack vector is network-based and requires low-privileged authentication. An attacker with a valid SAP user account connects to the SAP system through the RFC interface, for example using SAP GUI, an sapnwrfc client, or a custom ABAP program. The attacker invokes the vulnerable remote function module with chosen parameters. The module returns sensitive data without verifying that the user is authorized to retrieve it. No user interaction is required, and the attack does not need elevated privileges or chained vulnerabilities. The vulnerability mechanics are described in the SAP Note 3705094 advisory.

// No verified public exploit code is available for CVE-2026-34261.
// Refer to SAP Note 3705094 for vendor-provided technical detail.

Detection Methods for CVE-2026-34261

Indicators of Compromise

Unexpected RFC calls from user accounts that have no business reason to invoke Business Analytics or Content Management function modules.
Spikes in RFC traffic volume targeting the affected SAP components from a single user or host.
Audit log entries showing successful execution of restricted function modules by users lacking the corresponding authorization role.

Detection Strategies

Enable and review the SAP Security Audit Log for RFC function module calls, focusing on the modules referenced in SAP Note 3705094.
Correlate RFC call telemetry against user role assignments to identify callers acting outside their authorization scope.
Hunt for anomalous use of sapnwrfc-based clients or scripted RFC sessions originating from non-administrative endpoints.

Monitoring Recommendations

Forward SAP Security Audit Log and Gateway logs to a centralized SIEM for retention and correlation.
Establish baselines for RFC usage per user and alert on deviations such as new function modules being invoked.
Monitor authentication events for low-privileged accounts that begin issuing RFC traffic toward Business Analytics or Content Management endpoints.

How to Mitigate CVE-2026-34261

Immediate Actions Required

Apply the SAP security patch referenced in SAP Note 3705094 to all affected systems.
Inventory all SAP Business Analytics and SAP Content Management installations and confirm patch status.
Review user accounts with RFC access and revoke unnecessary privileges following the principle of least privilege.

Patch Information

SAP released remediation through SAP Note 3705094, published as part of the SAP Security Patch Day cycle. Administrators must download and apply the corresponding support package or correction instructions in development, test, and production systems. Validate the fix in non-production environments before rolling out to production landscapes.

Workarounds

Restrict RFC access at the SAP Gateway using reginfo and secinfo access control lists to limit which clients may call the affected modules.
Tighten role assignments so that only required users hold authorizations enabling access to Business Analytics and Content Management functions.
Place SAP application servers behind network segmentation that prevents direct RFC connectivity from untrusted user networks until patching is complete.

bash

# Example SAP Gateway access control entry (secinfo) limiting RFC callers
# Place in the secinfo file referenced by gw/sec_info
P TP=* HOST=app-server-01,app-server-02 USER=* USER-HOST=trusted-jumphost
D TP=* HOST=* USER=* USER-HOST=*