{keyword} Union All Select Null,null,null,null,null,null,null-- Pvwz May 2026

Example (Python/psycopg2): cursor.execute("SELECT * FROM users WHERE name = %s", (user_input,))

: This attempts to combine the results of the original legitimate database query with a new query controlled by the attacker. Example (Python/psycopg2): cursor

: This is a comment operator in SQL. It tells the database to ignore the rest of the original query, preventing errors from trailing code. How to Prevent This Example (Python/psycopg2): cursor

Ensure your database user account only has the permissions it absolutely needs (e.g., a web app shouldn't have permission to drop tables). Example (Python/psycopg2): cursor