CVE-2026-86204 [MEDIUM] – PocketMine-MP versions before 5.39.2 fail to limit JSON payload size in ModalFormResponseP

PocketMine-MP versions before 5.39.2 fail to limit JSON payload size in ModalFormResponsePacket handling, allowing authenticated players to cause denial of service. Attackers can send modal form response packets with massive JSON arrays to exhaust server memory and CPU resources, rendering the server unresponsive.