Vanna-ai v0.6.2 is vulnerable to SQL Injection due to insufficient protection against injecting additional SQL commands from user requests. The vulnerability occurs when the "generate_sql" function calls "extract_sql" with the LLM response. An attacker can include a semi-colon between a search data field and their own command, causing the "extract_sql" function to remove all LLM generated SQL and execute the attacker's command if it passes the "is_sql_valid" function. This allows the execution of user-defined SQL beyond the expected boundaries, notably the trained schema.