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CRITICAL severity

CVE-2026-89103

CRITICAL

CVE-2026-89103 is a critical-severity (CVSS 10) CWE-863 vulnerability. The records list no fixed version yet; check the vendor advisory below and apply the mitigations in the meantime.

SAP Gateway activates the default Access Control List with high privileges allowing categorization of external attacker as internal application server. As a result an unauthenticated…

Published
Updated
Affected
—
Patched
—
Exploits
None indexed
Exploitation data as of Nov 10, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Description

SAP Gateway activates the default Access Control List with high privileges allowing categorization of external attacker as internal application server. As a result an unauthenticated attacker with network access to the SAP Gateway could exploit this weakness to potentially perform unauthorized actions within the application environment, resulting in a high impact on the confidentiality, integrity, and availability of the affected system.

Detection & mitigation playbook

Vulnerability

  1. Detect

    Identify every host running the affected component and compare the installed build against the fixed version below — for source-built or distro-packaged software the version string, not a lockfile, is the source of truth (`dpkg -l`, `rpm -q`, or the binary's own `--version`).

  2. Remediation status

    The records we use list no fixed release for CVE-2026-89103. Check the upstream advisory for a patched version, and apply the exposure-reduction steps below in the meantime.

  3. Mitigate without a patch

    Put an independent control in front of the weakness: restrict the affected endpoint or interface to trusted networks, require an additional authentication factor or proxy-level check, and invalidate existing sessions and credentials in case the flaw has already been used.

Frequently Asked Questions

SAP Gateway activates the default Access Control List with high privileges allowing categorization of external attacker as internal application server. As a result an unauthenticated attacker with network access to the SAP Gateway could exploit this weakness to potentially perform unauthorized actions within the application environment, resulting in a high impact on the confidentiality, integrity, and availability of the affected system.
O3 Security · Impact-Aware SCA

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CVE-2026-89103: Critical 10 severity