- Fixed core broker bugs: classic queue segment cleanup for >4 MB messages and startup failures with Khepri metadata containing exclusive queues.
- Added enhancements: reduced memory/GC for large messages, new consumer‑count column in management UI, new `rabbitmqctl clear auth backend cache` command, and extra Prometheus labels.
- Deprecated `rabbitmq streams set stream retention policy` (now a no‑op) and raised Erlang requirement to version 26 (nodes on older Erlang will not start).
RabbitMQ 4.0.7
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Core server bug fixes: duplicate direct‑reply deliveries, quorum queue recovery issues, malformed AMQP 1.0 frames, topic‑exchange wildcard limits, and OAuth proxy header handling.