From 4915cc0da6d89823972245fbb65dc47f7270b256 Mon Sep 17 00:00:00 2001
From: JimMoen <LnJimMoen@outlook.com>
Date: Thu, 1 Aug 2024 15:23:35 +0800
Subject: [PATCH] chore: add changelog entry for 13357

---
 changes/ce/fix-13357.en.md | 4 ++++
 1 file changed, 4 insertions(+)
 create mode 100644 changes/ce/fix-13357.en.md

diff --git a/changes/ce/fix-13357.en.md b/changes/ce/fix-13357.en.md
new file mode 100644
index 000000000..ea497a847
--- /dev/null
+++ b/changes/ce/fix-13357.en.md
@@ -0,0 +1,4 @@
+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.