A batch route is an API endpoint that accepts multiple virtual requests inside one HTTP call. Instead of sending many separate requests, a client submits a bundle that the server processes in sequence or as a group. This can improve performance, but it also makes request parsing, authentication, and authorization more complex.
In cyber security, batch routes matter because a bug in how the server interprets the bundled requests can create a route-confusion flaw. Attackers may use that gap to smuggle a request past normal checks, reach actions that should be blocked, or trigger unsafe behavior in backend logic. Defenders should validate every subrequest independently, limit batch size, enforce method and path rules, and log unusual batch payloads. In systems like WordPress REST APIs, weak batch handling can turn a convenience feature into an entry point for exploitation.