Issues

• Issue with switches in HAOS: "Hold" function not working for Mosquitto broker and Zigbee2MQTT.

  Status: Available
  eclipse-mosquitto/mosquitto#3754 · Filter by author csdownloadpm777-cpu opened on Sep 30, 2026

• Inverted quota check in db__message_release_incoming() promotes all queued incoming QoS2 messages, violating Receive Maximum

  Status: Available
  eclipse-mosquitto/mosquitto#3750 · Filter by author huoyuxi opened on Sep 29, 2026

• mosquitto_want_write() can wrongfully return true

  Status: Available
  eclipse-mosquitto/mosquitto#3745 · Filter by author dirkfeytons opened on Sep 21, 2026
  1

• Message Expiry Interval deletes a QoS 2 exchange that has already passed PUBREC, so the owed PUBREL is never resent

  Status: Available
  eclipse-mosquitto/mosquitto#3744 · Filter by author gcf3711 opened on Sep 21, 2026

• A DISCONNECT carrying a reserved Reason Code is treated as a normal disconnection, so the Will Message is discarded

  Status: Available
  eclipse-mosquitto/mosquitto#3743 · Filter by author gcf3711 opened on Sep 21, 2026

• Windows 11: mosquitto_signal config-reload returns success but config is not reloaded when broker runs as a service

  Status: Available
  eclipse-mosquitto/mosquitto#3742 · Filter by author mpeterek opened on Sep 18, 2026

• Add an option to disconnect with Will Message

  Status: Available
  eclipse-mosquitto/mosquitto#3740 · Filter by author scaiper opened on Sep 13, 2026

• Integer overflow in mosquitto_pub

  Status: Available
  eclipse-mosquitto/mosquitto#3736 · Filter by author scaiper opened on Sep 6, 2026

• 2.1.2: mosquittopp_static is built with empty ${C_SRC} and ${LIBRARIES} (WITH_STATIC_LIBRARIES=ON fails to compile)

  Status: Available
  eclipse-mosquitto/mosquitto#3733 · Filter by author AndreasWinter19 opened on Sep 4, 2026

• 2.1: restored bridge session is expired at startup, before bridges are started

  Status: Available
  eclipse-mosquitto/mosquitto#3728 · Filter by author s-wouters opened on Aug 26, 2026

• Documentation on $SYS/broker/mqtt/# topics is wrong

  Status: Available
  eclipse-mosquitto/mosquitto#3726 · Filter by author mri-knx opened on Aug 25, 2026

• mosquitto_passwd can no longer be used to create users file for older mosquitto versions

  Status: Available
  eclipse-mosquitto/mosquitto#3720 · Filter by author patagonaa opened on Aug 21, 2026

• mosquitto_passwd -H argon2id fails with "Unable to hash password" on official Alpine images

  Status: Available
  eclipse-mosquitto/mosquitto#3719 · Filter by author poggenpower opened on Aug 19, 2026

• Shipped container configuration: HTTP API bound to all interfaces, and SBOM lacks mosquitto itself

  Status: Available
  eclipse-mosquitto/mosquitto#3718 · Filter by author FK-FW opened on Aug 19, 2026

• thread safety question

  Status: Available
  eclipse-mosquitto/mosquitto#3715 · Filter by author sk-rinicom opened on Aug 13, 2026

• Feature Request: Make setting of Mosquitto bridge flags “No Local” and “Retain as Published” configurable

  Status: Available
  eclipse-mosquitto/mosquitto#3714 · Filter by author dabgmx opened on Aug 13, 2026
  1

• Documentation unclear on maximum packet size (packet_max_auth, packet_max_connect, packet_max_sub, packet_max_simple)

  Status: Available
  eclipse-mosquitto/mosquitto#3713 · Filter by author julian-graf opened on Aug 12, 2026

• --test-config overwrites an existing persistence database with an empty database

  Status: Available
  eclipse-mosquitto/mosquitto#3712 · Filter by author CyrilB69 opened on Aug 12, 2026

• Mosquitto advises users to mark password and acl file executable

  Status: Available
  eclipse-mosquitto/mosquitto#3711 · Filter by author hachi opened on Aug 10, 2026
  1

• Shared subscription with a zero-length ShareName ("$share//filter") is accepted (MQTT-4.8.2-1)

  Status: Available
  eclipse-mosquitto/mosquitto#3706 · Filter by author UWCSZhou opened on Aug 10, 2026

• Built-in WebSockets: unmasked client frames are accepted (RFC 6455 §5.1)

  Status: Available
  eclipse-mosquitto/mosquitto#3705 · Filter by author UWCSZhou opened on Aug 10, 2026
  1

• Built-in WebSockets: a zero-length WebSocket data frame corrupts MQTT framing and drops the session

  Status: Available
  eclipse-mosquitto/mosquitto#3704 · Filter by author UWCSZhou opened on Aug 10, 2026

• Mosquitto Broker inexplicably hangs at times with no clear cause

  Status: Available
  eclipse-mosquitto/mosquitto#3703 · Filter by author SansTheMedic opened on Aug 7, 2026

• Mosquitto Persisted Client Message Use-After-Free

  Status: Available
  eclipse-mosquitto/mosquitto#3702 · Filter by author MrAlaskan opened on Aug 7, 2026

• PROXY v2 header split across TCP segments is reassembled incorrectly

  Status: Available
  eclipse-mosquitto/mosquitto#3701 · Filter by author MegaManSec opened on Aug 3, 2026