BigBlueButton 4.0.0-rc.1 released!

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Anton Georgiev

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Sep 1, 2026, 2:34:28 PM (yesterday) Sep 1
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We are pleased to announce BigBlueButton 4.0.0-rc.1!

BigBlueButton 4.0.0-rc.1 is the first release candidate for 4.0. Audio and LiveKit work dominates this iteration: the LiveKit bridge gains multi-room sessions with a membership-based token model (including automatic token refresh), breakout listen-in reaches parity with the FreeSWITCH/mediasoup transfer flow, and the "LiveKit as the audio state source" refactor lands with a long tail of talking-indicator, mute-state, and reconnection fixes. Advanced Filtering becomes pluggable with a second WASM backend (WorkAdventure/DTLN) alongside BBBA. The whiteboard switches to scroll-to-pan with Ctrl+scroll to zoom, the Learning Dashboard now works inside breakout rooms, and the webcam grid can be disabled per server or per meeting. Shared notes collect a round of BlockNote fixes covering math, link editing, export indentation, and the slash menu. Under the hood this candidate upgrades FreeSWITCH to 1.11.3 (from 1.10.12), bbb-webrtc-sfu to 2.25.0-beta.0, bbb-presentation-video to 5.1.0-rc.4, and lettuce-core to 7.7.0. Below is a list of the pull requests in this iteration, grouped by component.

For production use we still recommend the latest release of BigBlueButton 3.0.x.

Linked is a list of the pull requests in this iteration, grouped by component.

Link to installation command / instructions/ features:
https://docs.bigbluebutton.org/4.0/administration/install/

The full release notes are here
https://github.com/bigbluebutton/bigbluebutton/releases/tag/v4.0.0-rc.1

If you want to report any potential security issues with BigBlueButton, please check https://github.com/bigbluebutton/bigbluebutton/security/policy#reporting-a-vulnerability

As always, we welcome feedback on this latest update.
Anton and team

Hiroshi Suga

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Sep 1, 2026, 9:21:49 PM (23 hours ago) Sep 1
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Congratulations for the new release!

I am just wondering if we can make this feature optional:

feat(whiteboard): mouse wheel scrolls instead of zooming (use ctrl to zoom)

My users are already used to the zoom-by-wheel behaviour and it has been very comfortable to navigate the slide quickly. This has not been changed for many years in BBB. In addition, in school lectures we rarely use portrait dimension slide. 

Thank you for the consideration!

Anton Georgiev

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12:48 PM (7 hours ago) 12:48 PM
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Hi! Could you please give this a try and comment: https://github.com/bigbluebutton/bigbluebutton/pull/25739

Anton

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