Which of the following occurs when the security of a web application relies on JavaScript for input validation?

When a web application relies on client-side JavaScript for input validation, an attacker can disable or bypass the JavaScript, sending malformed or malicious data directly to the server. This direct manipulation bypasses the intended checks, allowing the attacker to potentially corrupt or alter the application's stored data, thereby compromising data integrity.

The security of input validation in a web application is distinct from endpoint antivirus protection, which primarily protects against malware on client devices or servers, not against bypassed application logic.

A host-based firewall controls network traffic at the host level and does not prevent malicious input from being sent to an application once a connection is established and client-side validation is bypassed.

Relying on JavaScript for input validation does not inherently make an application vulnerable to race conditions, which involve timing issues in concurrent operations, but rather exposes it to input bypass vulnerabilities.