Can a 400 Bad Request error be caused by server-side issues and not necessarily the client's request?

While 400 errors typically indicate client-side problems, misconfiguration or bugs on the server-side *can* sometimes lead to them. For example, if the server-side validation logic has a bug or the server fails to properly handle certain input, it might incorrectly return a 400 error even if the client's request is technically valid. This highlights the importance of thorough server-side testing and logging.