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Vulnerabilities ›

CVE-2026-27467

Low
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.
CWE-200 — Weakness Type
Published: Feb 21, 2026  ·  Modified: Feb 28, 2026  ·  Source: NVD
CVSS v3
2.0
🔗 NVD Official
📄 Description (English)

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.

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Queued for AI Analysis

This CVE will be auto-analyzed on the next cron run.

📦 Affected Products / CPE 1 entries
bigbluebutton:bigbluebutton
📊 CVSS Score
2.0
/ 10.0 — Low
📊 CVSS Vector
CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N
Attack VectorN — None / Network
Attack ComplexityH — High
Privileges RequiredH — High
User InteractionR — Required
ScopeU — Unchanged
ConfidentialityL — Low / Local
IntegrityN — None / Network
AvailabilityN — None / Network
📋 Quick Facts
Severity Low
CVSS Score2.0
CWECWE-200
EPSS0.03%
Exploit No
Patch ✓ Yes
Published 2026-02-21
Source Feed nvd
Views 1
🏷️ Tags
patch-available CWE-200
🏢 Vendor Advisories
🔗 https://github.com/bigbluebutton/bigbluebutton/secur...
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