Flowise versions 3.0.5 up to but not including 3.0.6 contain an arbitrary file read vulnerability in the chatId parameter of two API endpoints. This flaw allows unauthenticated users with knowledge of a valid chatflowId UUID to read arbitrary files on the local filesystem, including the default SQLite database file. The vulnerability arises from insufficient validation of the chatId parameter combined with fallback logic that bypasses directory restrictions. Exploitation can lead to disclosure of sensitive data such as API keys stored in the database and causes denial of service by corrupting file access until server restart.