{keyword}) Union All Select Null,null,null,null,null,null# May 2026

To protect your application from this type of attack, you should avoid building queries using simple string concatenation. Instead, use:

: In MySQL, the hash symbol marks the rest of the line as a comment . This effectively deletes any remaining parts of the original developer's code (like a trailing WHERE clause or a closing quote) that would otherwise cause a syntax error. Why This Matters {KEYWORD}) UNION ALL SELECT NULL,NULL,NULL,NULL,NULL,NULL#

: Most modern frameworks like Hibernate or Entity Framework handle this protection automatically. To protect your application from this type of

: This treats user input as data, not as executable code. use: : In MySQL