SQL template tags are not vulnerable to SQL injection attacks due to their use of tag functions, which process strings safely by separating SQL query strings from their parameters. SQL injection, a common security vulnerability, occurs when an attacker manipulates database queries to gain unauthorized access to data. The @neondatabase/serverless driver enables secure database connections in serverless and edge environments by utilizing a syntax that appears similar to template literals but incorporates a tag function to handle the string and parameters separately. This approach, also used by several Postgres clients and query builders, ensures that user-provided input is properly sanitized and validated, preventing SQL injection attacks. The underlying mechanism involves using a custom tag function to return both the query and parameters, which are then passed to a query function, adhering to the parameterized query method for enhanced security.