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HiveMQ Release

HiveMQ 4.28.27 Maintenance Release

by HiveMQ TeamJUN 30, 2026

The HiveMQ team is pleased to announce the availability of HiveMQ 4.28.27.

This maintenance release for the 4.28 series includes the following bug fixes and improvements:

HiveMQ Enterprise MQTT Broker

  • Increased the receive buffer size for HiveMQ bridge client connections.
  • Fixed a rare merge replication condition that could cause dropped messages.
  • Added TCP memory metrics (com.hivemq.system.os.network.tcp.memory.pages.used and com.hivemq.system.os.network.tcp.memory.pages.max) to monitor current TCP memory usage and the configured system limit on Linux deployments.
  • Improved diagnostic archive security by automatically redacting the values of environment variables and JVM system properties whose key names contain sensitive terms.

HiveMQ Enterprise Bridge Extension

  • Added a configuration option to enable TLS hostname verification.

HiveMQ Enterprise Security Extension

  • Fixed incorrect target tables for several indexes and triggers in the packaged SQL create scripts for PostgreSQL and MySQL.

HiveMQ Enterprise Extension SDK

  • Added runtime deprecation warnings that flag the Enterprise Extension SDK methods and bridge configurations scheduled to change in the next HiveMQ LTS release.

Have a great day, The HiveMQ Team