Injection attacks are a type of cyber threat where an attacker sends malicious data into a program, tricking it into executing harmful commands. This often happens through web forms or APIs, where the attacker inputs code instead of expected data. Common types of injection attacks include SQL injection, where harmful SQL commands are inserted into a database query, and Command injection, where system commands are executed on a server. These attacks can lead to serious consequences, such as unauthorized access to sensitive information, data loss, or even complete control over a system. To protect against injection attacks, developers should validate and sanitize user inputs, ensuring that only safe data is processed.