- Security patch added for CVE‑2021‑32719 (low severity).
- Peer discovery (core server, Kubernetes, AWS) now uses Erlang's internal distributed locking instead of randomized delays, deprecating related config keys.
- Bug fixes include queue deletion exception, double‑stack listener issues in Prometheus and Management plugins, federation queue declaration behavior, new HTTP client timeout settings, and several dependency upgrades.
RabbitMQ 3.8.18
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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.