# CVE-2026-89103: SAP Gateway default ACL authentication bypass

Source: https://junglewise.ai/threats/cve-2026-89103-sap-gateway-activates-the-default-access-control-list-with-high  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-89103 · Severity: critical · CVSS 10 · Published 2026-11-10

SAP Gateway, a critical middleware component that manages communication between SAP applications and external systems, has a flaw where it activates a default Access Control List with high privileges. An attacker without credentials can exploit this over the network to impersonate an internal application server and perform unauthorized actions, potentially compromising confidentiality, integrity, and availability of the entire SAP environment.

Vendors: [SAP](https://junglewise.ai/threats/vendors/sap).

## Quick answers

**Is CVE-2026-89103 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-89103 being exploited in the wild.

**How severe is CVE-2026-89103?** Critical severity, with a CVSS score of 10, published 10 November 2026.

**Which products and versions are affected?** SAP Gateway.

**Is there a fix for CVE-2026-89103?** 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-2026-89103 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-89103?** Check whether you run SAP Gateway. 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

An unauthenticated remote attacker can exploit a default Access Control List (ACL) configuration in SAP Gateway with escalated privileges to masquerade as a trusted internal application server. This network-based vulnerability requires no authentication or user interaction, allowing complete compromise of the gateway's security posture. The flaw enables unauthorized access to perform actions normally restricted to internal trusted components.

## Affected products

- SAP Gateway

## Timeline

- 2026-11-10: disclosed

## References

- [https://me.sap.com/notes/3798345](https://me.sap.com/notes/3798345)
- [https://url.sap/sapsecuritypatchday](https://url.sap/sapsecuritypatchday)