GHSA-4j8x-x6v7-w9rq: Flowise: RCE via CSVAgent csvFile data URI base64 segment is interpolated into Python source without validation

Flowise's CSVAgent has a remote code execution (RCE, where an attacker can run commands on a system they don't own) vulnerability because it takes user-supplied data from a CSV file URI, inserts it directly into Python code without checking it, and then executes that code. Since the Python environment (Pyodide, a tool that runs Python in JavaScript) can access JavaScript functions like `eval` and file operations, an attacker can break out of the Python code, run JavaScript commands, and gain full control of the server, even without authentication.