CVE Explorer

CVE-2026-27467

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.

Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:bf92e2ff97374451d9e74973117e2b8e0fc60ec5747e857a7a1ea3c76fa6b699

Known exploited

Not asserted

Disputed

Stale source

Conflicts

Affected products and versions

1 source assertion

{"product":"bigbluebutton","vendor":"bigbluebutton","versions":[{"status":"affected","version":"< 3.0.20"}]}

cve_program_cvelist_v5affected
urn:baitaphish:normalized-source-record:v2:16777e4e0c1dd5ae6a4f4018b293aafbc347cfa90de45072f34943a61bd2bd22 · sha256:7819b3fa376b1b3c… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion

{"metric":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":2,"baseSeverity":"LOW","confidentialityImpact":"LOW","integrityImpact":"NONE","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N","version":"3.1"},"metric_type":"cvssV3_1"}

cve_program_cvelist_v5cvss
urn:baitaphish:normalized-source-record:v2:16777e4e0c1dd5ae6a4f4018b293aafbc347cfa90de45072f34943a61bd2bd22 · sha256:7819b3fa376b1b3c… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion

{"cweId":"CWE-200","description":"CWE-200: Exposure of Sensitive Information to an Unauthorized Actor","lang":"en","type":"CWE"}

cve_program_cvelist_v5cwe
urn:baitaphish:normalized-source-record:v2:16777e4e0c1dd5ae6a4f4018b293aafbc347cfa90de45072f34943a61bd2bd22 · sha256:7819b3fa376b1b3c… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions

{"name":"https://github.com/bigbluebutton/bigbluebutton/commit/3aa47832bc2b17178799bd932453c226e8f95703","tags":["x_refsource_MISC"],"url":"https://github.com/bigbluebutton/bigbluebutton/commit/3aa47832bc2b17178799bd932453c226e8f95703"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:16777e4e0c1dd5ae6a4f4018b293aafbc347cfa90de45072f34943a61bd2bd22 · sha256:7819b3fa376b1b3c… · /containers/cna/references/1

{"name":"https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-6gj9-5rhm-68j8","tags":["x_refsource_CONFIRM"],"url":"https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-6gj9-5rhm-68j8"}

cve_program_cvelist_v5reference
urn:baitaphish:normalized-source-record:v2:16777e4e0c1dd5ae6a4f4018b293aafbc347cfa90de45072f34943a61bd2bd22 · sha256:7819b3fa376b1b3c… · /containers/cna/references/0

Attribution and limitations

CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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