- Fixed generic binary packages that were built with the wrong version (4.0.0+2 instead of 4.0.1).
- Raised the minimum Erlang requirement to Erlang 26; nodes on older Erlang versions will fail to start.
- Limited community support for the 4.0.x series to regular contributors and commercial license holders.
RabbitMQ 4.0.2
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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.