CVE-2026-89111

OAuth2 SSRF vulnerability in SAP Cloud SDK for Python

State: Published
Severity: 10.0 Critical
Published: Oct 13, 2026
Updated: Oct 30, 2026
Reserved: Sep 10, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	10.0 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:N	sap

Weaknesses

CWE-918 Server-Side Request Forgery

Affected Products

Product	Versions
SAP CloudSAP_SE	sap-cloud-sdk < 0.45.2Affected >=0.53.0 to before 0.55.1Affected

References

https://github.com/SAP/cloud-sdk-python/security/advisories/GHSA-4mv3-jxxm-9cx2
https://url.sap/sapsecuritypatchday

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