CVE-2026-27467

LOW

2.0

Description

BigBlueButton is an open-source virtual classroom. In versions 3.0.19 and below, when first joining a session with the microphone muted, the client sends audio to the server regardless of mute state. Media is discarded at the server side, so it isn't audible to any participants, but this may allow for malicious server operators to access audio data. The behavior is only incorrect between joining the meeting and the first time the user unmutes. This issue has been fixed in version 3.0.20.

CVE Details

CVSS v3.1 Score2.0

SeverityLOW

CVSS VectorCVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N

Attack VectorNETWORK

ComplexityHIGH

Privileges RequiredHIGH

User InteractionREQUIRED

Published2/21/2026

Last Modified2/26/2026

Sourcenvd

Honeypot Sightings0

Affected Products

bigbluebutton:bigbluebutton

Weaknesses (CWE)

CWE-200

References

https://github.com/bigbluebutton/bigbluebutton/commit/3aa47832bc2b17178799bd932453c226e8f95703(security-advisories@github.com)

https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-6gj9-5rhm-68j8(security-advisories@github.com)

IOC Correlations

No correlations recorded

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