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emqx/changes/ce/fix-13357.en.md
JimMoen 4915cc0da6
chore: add changelog entry for 13357
2024-08-01 15:23:58 +08:00

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Stop returning CONNACK or DISCONNECT to clients that sent malformed CONNECT packets.

  • Only send CONNACK with reason code frame_too_large for MQTT-v5.0 when connecting if the protocol version field in CONNECT can be detected.
  • Otherwise DONOT send any CONNACK or DISCONNECT packet.