---
id: CVE-2026-89111
title: >-
  The SAP Cloud SDK for Python contains an OAuth2 SSRF vulnerability affecting
  multi-tenant BTP applications
summary: >-
  The SAP Cloud SDK for Python contains an OAuth2 SSRF vulnerability affecting
  multi-tenant BTP applications. An attacker who controls the tenant_subdomain
  parameter can redirect OAuth2 token requests to an attacker-controlled server,
  caus…
severity: critical
cvss: 10
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N'
cwe:
  - CWE-918
published: '2026-10-13'
updated: '2026-10-13'
sourceUpdated: '2026-10-13T03:16:41.133'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-89111'
references:
  - url: >-
      https://github.com/SAP/cloud-sdk-python/security/advisories/GHSA-4mv3-jxxm-9cx2
    label: cna@sap.com
  - url: 'https://url.sap/sapsecuritypatchday'
    label: cna@sap.com
  - url: >-
      https://github.com/SAP/cloud-security-services-integration-library/security/advisories/GHSA-4mv3-jxxm-9cx2
    label: cna@sap.com
tags:
  - nvd
ingestedAt: '2026-10-13T02:12:00.762Z'
---

## Overview

The SAP Cloud SDK for Python contains an OAuth2 SSRF vulnerability affecting multi-tenant BTP applications. An attacker who controls the tenant_subdomain parameter can redirect OAuth2 token requests to an attacker-controlled server, causing client credentials to be exfiltrated.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.