- Fixed numerous core broker and plugin bugs (e.g., quorum queue exceptions, MQTT reconnection issues, management API errors, Prometheus label escaping) and improved cluster‑status and HTTP API latency.
- Added enhancements such as early detection of invalid virtual‑host definition files, faster diagnostics, better metric handling, and AWS peer discovery type spec updates.
- Updated Erlang compatibility (requires Erlang 25, supports up to 26.1.x) and upgraded osiris to 1.7.2; AMQP 1.0 plugin header conversion now follows the spec, which may be a breaking change.
RabbitMQ 3.12.11
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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.