{keyword}') Union All Select Null,null,null,null,null,null,null,null,null-- Zljd May 2026

: The user-provided input. The ' and ) are used to close the developer’s original SQL statement (e.g., SELECT * FROM products WHERE name = ('$KEYWORD') ).

: Instead of building query strings with user input, use placeholders ( ? ). This ensures the database treats input as literal text, not executable code. : The user-provided input

: Ensure the database user account used by the app only has the permissions it absolutely needs. : The user-provided input

: In some configurations, attackers can run commands to delete tables or modify sensitive financial records. ✅ How to Prevent This : The user-provided input

: This is the heart of the attack. It combines the results of the original query with a new query defined by the attacker.