Is CVE-2026-89121 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-89121 being exploited in the wild.

How severe is CVE-2026-89121?

Medium severity, with a CVSS score of 4.7, published 13 October 2026.

Is there a fix for CVE-2026-89121?

No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

How is CVE-2026-89121 attacked?

It is attacked with local access, in a hosted service.

Am I affected by CVE-2026-89121?

Check whether you run SAP S/4HANA. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

CVE-2026-89121: SAP S/4HANA authorization bypass in business object modification

CVE-2026-89121 · Severity: medium · CVSS 4.7 · Published 2026-10-13

SAP S/4HANA, an enterprise resource planning system that manages critical business operations, contains a flaw that allows users with low-level system access to bypass authorization controls and modify business data they should not have permission to change. An attacker exploiting this vulnerability could alter sensitive records, compromise data integrity, and potentially disrupt financial or operational records without proper audit trails.

Technologies: SAP S/4HANA. Vendors: SAP.

Quick answers

Is CVE-2026-89121 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-89121 being exploited in the wild.
How severe is CVE-2026-89121?: Medium severity, with a CVSS score of 4.7, published 13 October 2026.
Which products and versions are affected?: SAP S/4HANA.
Is there a fix for CVE-2026-89121?: No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-89121 attacked?: It is attacked with local access, in a hosted service.
Am I affected by CVE-2026-89121?: Check whether you run SAP S/4HANA. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability involves insufficient instance-level authorization checks in S/4HANA when performing modification operations on associated business object data. An attacker with low privileges and local system access can bypass these checks to modify data they are not authorized for. The vulnerability impacts data integrity with no effect on confidentiality or availability.

Affected products

SAP S/4HANA

Timeline

2026-10-13: advisory

References

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