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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.

🤖

Queued for AI Analysis

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

🔗 References & Sources 2

https://github.com/bigbluebutton/bigbluebutton/commit/3aa47832bc2b17178799bd932453c226e...

security-advisories@github.com

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

security-advisories@github.com

Patch Vendor Advisory

📦 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 2

🏷️ Tags

patch-available CWE-200

🏢 Vendor Advisories

🔗 https://github.com/bigbluebutton/bigbluebutton/secur...

⚡ Actions

🔗 NVD Official Page ⚡ Exploit-DB Search 🐙 GitHub PoC Search 🎯 MITRE ATT&CK 📊 CVE Details

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