A vulnerability was found in chatchat-space Langchain-Chatchat up to 0.3.1.3 . It has been declared as critical . 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. This vulnerability is reported as CVE-2026-7844 . The attacker must have access to the local network to execu