CVE-2026-89105
Received Received - Intake

SAP Cloud Security Services Integration Library Ambient Token Authentication Bypass

Publication date: 2026-10-13

Last updated on: 2026-10-13

Assigner: SAP SE

Description
The HybridTokenAuthenticator component of the SAP/cloud-security-services-integration-library accepts tokens from unintended ambient IAS/XSUAA bindings, potentially allowing unauthorized access. This vulnerability allows an attacker to gain unauthorized access to the system by using tokens that should not be accepted, leading to a breach of security.

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Meta Information

Published
2026-10-13
Last Modified
2026-10-13
Generated
2026-10-13
AI Q&A
2026-10-13
EPSS Evaluated
N/A
NVD
CVE-2026-89105
EUVD
EUVD-2026-98188

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
SAP_SE SAP/cloud-security-services-integration-library >=3.6.6
SAP_SE SAP/cloud-security-services-integration-library <4.1.1

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-1188 The product initializes or sets a resource with a default that is intended to be changed by the product's installer, administrator, or maintainer, but the default is not secure.

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Executive Summary

The HybridTokenAuthenticator component in SAP's cloud-security-services-integration-library incorrectly accepts tokens from unintended ambient IAS/XSUAA bindings. This allows unauthorized access to the system by accepting tokens that should not be trusted.

Impact Analysis

An attacker could exploit this to gain unauthorized access to your SAP system, potentially leading to data breaches, unauthorized actions, or system compromise. The impact depends on the permissions of the misused tokens.

Compliance Impact

This vulnerability could lead to unauthorized access, violating data protection requirements in GDPR and HIPAA. Compliance may be compromised if sensitive data is exposed due to unauthorized access.

Mitigation Strategies

Review and restrict ambient IAS/XSUAA bindings for the HybridTokenAuthenticator component to ensure only intended tokens are accepted. Update the SAP/cloud-security-services-integration-library to the latest patched version if available.

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