This is the #1 defense. It treats user input as literal data, not executable code.
: 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 This is the #1 defense
Use "allow-lists" to ensure input matches the expected format (e.g., ensuring a ZIP code is only numbers). It tells the database to ignore the rest
: This attempts to combine the results of the original legitimate database query with a new query controlled by the attacker. Ensure your database user account only has the
Ensure your database user account only has the permissions it absolutely needs (e.g., a web app shouldn't have permission to drop tables).
If you're building an application, you should never let user input go directly into a database query. Instead, use these industry-standard defenses:
The string you provided is a common technique used in . Specifically: