CVE-2026-27679: Missing Authorization check in SAP S/4HANA Frontend OData Service (Manage Reference Structures)

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-04-14 · updated 2026-10-26
Weakness: CWE-862

Description

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.

Affected products

SAP_SE SAP S/4HANA Frontend OData Service (Manage Reference Structures): uis4h_109

References

https://me.sap.com/notes/3716767
https://url.sap/sapsecuritypatchday

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