Information disclosure in BigBlueButton - CVE-2026-27467
Published: February 20, 2026
Vulnerability identifier: #VU123108
CSH Severity: Low
CVSS v4: 1.8 [CVSS:4.0/AV:N/AC:H/AT:N/PR:H/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-27467
CWE-ID: CWE-200
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to gain access to potentially sensitive information.
The vulnerability exists due to the client sends audio to the server when first joining a session even with the microphone muted. A remote administrator can gain unauthorized access to sensitive information on the system.
Affected software
BigBlueButton
How to mitigate CVE-2026-27467
Install updates from vendor's website.
BigBlueButton - update to 3.0.20