- Core fixes: quorum‑queue metrics/snapshot after upgrades, stricter and faster AMQP 1.0 parsing.
- Plugin fixes: Stream SA coordinator bug, Management UI CSP hardening and OAuth2 redirect fix, exclusive‑queue metric noise resolved, and Federation name‑collision state corruption fixed.
- Maintenance release with only bug fixes and a security hardening (CSP).
RabbitMQ 4.3.4
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Minimum supported Erlang version upgraded to 27.0; Erlang/OTP 26 is now unsupported, causing nodes on older Erlang to fail to start (breaking change).
Minimum supported Erlang version upgraded to 27.0; nodes on older Erlang will refuse to start.
Core server fixes: tie‑binding bug, correct storage of password‑less users, consumer activity updates, argument validation, default queue type handling, and smarter feature‑flag sync; plus enhancements like per‑node channel limits, paral...