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Apache ActiveMQ

DEVOPS
Velocity5.0

Multi-protocol open-source message broker

activemq.apache.org ↗

ActiveMQ backports an AMQP decompression fix across all three maintained release lines simultaneously

message-brokeropen-sourceapacheamqpenterprise-messaging
◆Current state
Apache ActiveMQ is in multi-branch maintenance mode, servicing 5.19.x (Classic), 6.2.x, and 6.3.x release trains in parallel. The AMQP object message decompression bug required synchronized backporting across all three lines. Security-related defaults have also tightened — the maximum AMQP frame size dropped to 10 MB and advisory topic configuration was hardened against known attack patterns.
◆Where it's heading
The three-branch cadence reflects a long-term obligation to enterprise users on legacy Classic installations while the project advances on the Artemis (v6.x) architecture. ActiveMQ 6.3.0 added MQTTv5 validation and dropped 'Classic' from internal naming, signaling that Artemis is now the unambiguous forward direction. The 5.19.x branch will continue receiving security patches through its EOL window.
◆Prediction
New features will concentrate in the 6.x Artemis branch. The next 6.x release will likely add additional MQTT or AMQP protocol improvements given recent activity in those areas. The 5.19.x series will continue receiving security and stability patches until a formal EOL is announced.

◆Recent moves

  1. 13d ago

    Apache ActiveMQ v5.19.11

    ActiveMQ 5.19.11 adds destination garbage collection sweep support for destinations with will producers — a meaningful stability improvement for long-running Classic deployments accumulating stale destinations. Several additional bug fixes ship alongside.

    View source ↗
  2. 18d ago

    ActiveMQ 6.3.2: release tag

    A Maven release plugin tag commit for the 6.3.2 release with no changelog detail provided. Administrative release artifact.

    View source ↗
  3. 1mo ago

    Apache ActiveMQ 5.19.10

    The AMQP object message decompression bug is fixed in the 5.19.10 line — the same issue addressed across 6.2.9 and 6.3.1 in parallel, indicating the project treated this as a cross-branch priority. An important protocol correctness fix for deployments using AMQP message compression.

    View source ↗
  4. 1mo ago

    Apache ActiveMQ 6.2.9

    ActiveMQ 6.2.9 backports the AMQP object message decompression fix to the 6.2.x Artemis branch, maintaining parity with the Classic branch fix landed in the same release cycle.

    View source ↗
  5. 1mo ago

    Apache ActiveMQ 6.3.1

    ActiveMQ 6.3.1 applies the AMQP decompression fix to the newest 6.3.x branch, completing the synchronized three-branch backport. This release also bootstrapped the 6.3.x branch from 6.2.x earlier in its history.

    View source ↗
  6. 1mo ago

    Apache ActiveMQ 5.19.9

    ActiveMQ 5.19.9 reduces the default maximum AMQP frame size from its previous value to 10 MB, hardening the broker against oversized-frame attacks. Advisory topic security configuration was also updated, reflecting responses to known vulnerability patterns documented in the project's SECURITY.md.

    View source ↗