JDBC INIT Injection is a cybersecurity vulnerability where attackers manipulate the initialization parameters or commands sent through Java Database Connectivity (JDBC) mechanisms. By injecting malicious code into these initialization strings, attackers can alter database behavior, bypass security controls, or execute unauthorized commands during the database connection setup. This attack targets the configuration phase, which is often overlooked in traditional SQL injection defenses. Proper input validation, restricting user-supplied data in JDBC initialization, and using secure coding practices are essential to prevent such attacks. Organizations should also monitor and audit database connection activities to detect unusual or unauthorized initialization attempts.