BIT-DISCOURSE-2026-44786 Discourse: Public chat MessageBus broadcasts are not restricted to chat-eligible users

Discourse is an open-source discussion platform. From versions 2026.1.0 to before 2026.1.4, 2026.3.0 to before 2026.3.1, and 2026.4.0 to before 2026.4.1, chat events for public category channels are published to MessageBus without permission scoping, so any MessageBus subscriber without chat...