Auth bypass in SAP Manage Reference Structures
CVE-2026-27679
Due to missing authorization checks in the SAP S/4HANA frontend OData Service (Manage Reference Structures), an attacker could update and delete child entities via exposed OData services without proper authorization. This vulnerability has a high impact on integrity, while confidentiality and availability are not impacted.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N.
EPSS exploit prediction
EPSS: 0.003 (21.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 22nd percentile — 21.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.003 · change: +0.001
Affected products
- SAP Manage Reference Structures — versions uis4h_109
- SAP S\/4hana
- SAP Se S/4hana Frontend Odata Service (Manage Reference Structures) — versions UIS4H 109
Weakness classification (CWE)
References
- me.sap.com/notes/3716767 (Permissions Required)
- url.sap/sapsecuritypatchday (Permissions Required)
Frequently asked questions
- What is CVE-2026-27679?
- CVE-2026-27679 is a medium-severity vulnerability in SAP Manage Reference Structures, classified under Missing Authorization. CVSS score: 6.5/10. Published 2026-04-14.
- How severe is CVE-2026-27679?
- Medium severity. CVSS v3 base score is 6.5 out of 10.