This bypass method works when a WAF is unable to handle very large HTTP requests due to limited buffer sizes, while the backend server can accept such large requests. In this case, the WAF leaves the request without proper inspection because it cannot process the entire request data. This allows potential malicious payloads to reach the backend server unchecked. However, if the buffer sizes of the WAF and the backend server are synchronized, this type of bypass will likely fail, as the WAF will inspect the full request similarly to the backend server. This technique illustrates a fundamental vulnerability in WAF design related to request size handling and buffer limitations, potentially exposing applications to various attacks like XSS, SQLi, RCE, etc., if the exploit payload resides in the oversized request portion. The bypass affects many types of vulnerabilities and is therefore considered a universal issue rather than specific to one WAF vendor or vulnerability type.