CVE-2026-89111
Critical
Description
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.
SeverityCritical
CVSS10.0
Exploit probability—
ProductSAP Cloud
PublishedOct 13, 2026
First seenOct 13, 2026
Weakness typeCWE-918Server-side request forgery (SSRF)
How to fix
Update
- SAP_SE SAP Cloud0.55.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| SAP_SE SAP Cloud | sap-cloud-sdk < 0.45.2, >=0.53.0 ≤ v < 0.55.1 | 0.55.1 |
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