OAuth2 SSRF Vulnerability in SAP Cloud SDK for Python Affects Multi-Tenant Applications

CVE-2026-89111

What is CVE-2026-89111?

CVE-2026-89111 is a significant vulnerability identified within the SAP Cloud SDK for Python, specifically affecting multi-tenant applications on the Business Technology Platform (BTP). This vulnerability centers around an OAuth2 Server-Side Request Forgery (SSRF) flaw that allows an attacker to manipulate the tenant_subdomain parameter. By doing so, they can redirect OAuth2 token requests to a server controlled by the attacker. This diversion can lead to the exfiltration of client credentials, posing a serious risk to the security of sensitive user information and application integrity. Given the widespread use of SAP's BTP for application development and management, organizations leveraging this SDK could experience substantial consequences if this vulnerability is exploited.

Potential impact of CVE-2026-89111

1. Credential Theft: The primary impact of CVE-2026-89111 is the potential for attackers to extract client credentials. This breach of confidentiality can allow unauthorized access to services and sensitive data, leading to further exploitation of the affected applications.

2. Data Breaches: Exploiting this vulnerability can lead to significant data breaches, as compromised credentials might provide attackers with pathways to other interconnected systems within the organization. This can result in unauthorized data manipulation or theft, damaging corporate reputation and stakeholder trust.

3. Application Integrity Compromise: By redirecting OAuth2 requests, attackers can manipulate authentication mechanisms, undermining the integrity of SAP applications. This can lead to unauthorized operations within applications, impacting their overall functionality and potentially leading to service outages or failures.

Human OS v1.0:
Ageing Is an Unpatched Zero-Day Vulnerability.

Remediate biological technical debt. Prime Ageing uses 95% high-purity SIRT6 activation to maintain genomic integrity and bolster systemic resilience.

This is an advertDeploy the Patch →

References