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CVE-2026-27467

2.0 · LOW

BigBlueButton is an open-source virtual classroom.

Published Feb 21, 2026CWE-200EPSS 0.29%

Overview

CVE-2026-27467 is a low-severity vulnerability. It was published on February 21, 2026 and has a CVSS 3.1 base score of 2.0 (LOW).

This vulnerability has a CVSS 3.1 base score of 2.0, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/bigbluebutton/bigbluebutton/commit/3aa47832bc2b17178799bd932453c226e8f95703GitHubgithub.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-6gj9-5rhm-68j8

How CyberStrike helps

Frequently asked questions

What is CVE-2026-27467?

CVE-2026-27467 is a low-severity vulnerability. It was published on February 21, 2026 and has a CVSS 3.1 base score of 2.0 (LOW).

How severe is CVE-2026-27467?

This vulnerability has a CVSS 3.1 base score of 2.0, rated LOW. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-27467?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-27467?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-27467 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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