Language: Python
Label: vulnerable
CWE: CWE-400 \u2014 Uncontrolled Resource Consumption
The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources.

Code:
    def on_part_end(self) -> None:
        message = (MultiPartMessage.PART_END, b"")
        self.messages.append(message)