CVE-2026-27672: Material Master Information Disclosure

CVE-2026-27672 Overview

CVE-2026-27672 is a Missing Authorization vulnerability (CWE-862) affecting the SAP Material Master application. The application fails to enforce proper authorization checks for authenticated users when executing reports, allowing unauthorized access to sensitive information. While the impact is limited to confidentiality with no effect on system integrity or availability, this vulnerability could expose business-critical material data to unauthorized personnel within an organization.

Critical Impact

Authenticated users can bypass authorization controls to access sensitive report data in SAP Material Master, potentially exposing confidential business information.

Affected Products

• SAP Material Master Application (specific versions available in SAP Note #3703276)

Discovery Timeline

• April 14, 2026 - CVE CVE-2026-27672 published to NVD
• April 14, 2026 - Last updated in NVD database

Technical Details for CVE-2026-27672

Vulnerability Analysis

This vulnerability stems from insufficient authorization enforcement within the SAP Material Master application's report execution functionality. When authenticated users request to execute reports, the application fails to validate whether the user possesses the necessary authorization objects and permissions to access the requested data. This represents a classic broken access control scenario where authentication is verified but authorization is not properly enforced.

The vulnerability allows any authenticated user to execute reports and retrieve data that should be restricted to users with specific authorization roles. In SAP environments, this could expose sensitive material master data including pricing information, vendor details, procurement data, and other confidential business records.

Root Cause

The root cause is a Missing Authorization Check (CWE-862) in the report execution logic of the Material Master application. The application verifies that users are authenticated but does not perform subsequent checks to ensure they have the appropriate authorization objects assigned to their user profile before returning report results.

Attack Vector

The attack vector is network-based and requires low privileges (authenticated user access). An attacker would need valid credentials to access the SAP system, after which they could exploit the missing authorization check by directly accessing report functions they should not have access to.

The exploitation is straightforward: an authenticated user navigates to the Material Master reporting functionality and executes reports. Due to the missing authorization check, the system returns data without verifying whether the user's role permits access to that specific report or data set. No user interaction is required beyond the attacker's own actions.

Detection Methods for CVE-2026-27672

Indicators of Compromise

• Unusual report execution patterns by users who typically do not access Material Master data
• Authenticated users accessing reports outside their normal business function
• Increased volume of report executions from specific user accounts
• Access logs showing users querying material data across multiple company codes or plants they don't manage

Detection Strategies

• Enable and review SAP Security Audit Log (SM21) for report execution events in Material Master
• Implement authorization trace analysis using transaction ST01 to detect missing authorization checks
• Configure alerts for report executions by users lacking standard Material Master authorization objects
• Review user activity reports for anomalous access patterns to MM reporting transactions

Monitoring Recommendations

• Monitor SAP Security Audit Log for Material Master transaction codes and report executions
• Implement SIEM integration to correlate SAP access logs with user role assignments
• Establish baseline metrics for normal report access patterns per user role
• Configure real-time alerts for report access attempts that bypass standard authorization workflows

How to Mitigate CVE-2026-27672

Immediate Actions Required

• Review and apply SAP Security Note #3703276 as soon as possible
• Audit current user access to Material Master reporting functions
• Implement compensating controls by restricting network access to vulnerable transactions if immediate patching is not possible
• Review recent access logs to identify any potential exploitation of this vulnerability

Patch Information

SAP has released a security patch addressing this vulnerability. Detailed patch information and implementation instructions are available in SAP Note #3703276. Organizations should also review the SAP Security Patch Day advisory for additional context and related security updates.

Workarounds

• Restrict access to Material Master reporting transactions at the transaction code level using authorization object S_TCODE
• Implement additional authorization checks at the organizational level (company code, plant, storage location)
• Consider temporarily disabling vulnerable report functions until the patch can be applied
• Use SAP GRC Access Control to enforce segregation of duties and detect unauthorized access attempts

# SAP authorization check configuration example
# Add authorization object checks in transaction SU24 for affected transactions
# Verify these authorization objects are properly assigned:
# - M_MATE_STA (Material Master: Maintenance Status)
# - M_MATE_MAR (Material Master: Material Type)
# - M_MATE_WRK (Material Master: Plant)