Which security actions must be implemented to prevent an API injection attack?

Logging and monitoring failed attempts are crucial for detection, forensics, and incident response, but they do not actively prevent the initial injection attack from occurring.

Using password hashes and biometric authentication strengthens authentication and protects against credential theft, but these measures do not directly prevent injection attacks once an authenticated session is established.

API injection attacks, such as SQL injection or command injection, occur when untrusted input is directly incorporated into queries or commands without proper handling. Validating data ensures it meets expected types and formats, filtering removes disallowed characters or patterns, and sanitizing transforms or escapes potentially harmful input, effectively neutralizing the injection vector and preventing the attack.

Short-lived access tokens and authenticating applications improve authorization security and limit the window for token misuse, but they do not stop malicious data from being injected into API calls if the application is vulnerable to input processing flaws.