CVE-2026-27467

{"id": "CVE-2026-27467", "cveTags": [], "metrics": {"cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 2.0, "attackVector": "NETWORK", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "HIGH", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 0.5}, {"type": "Primary", "source": "nvd@nist.gov", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 2.4, "attackVector": "NETWORK", "baseSeverity": "LOW", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:N/A:N", "integrityImpact": "NONE", "userInteraction": "REQUIRED", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "HIGH", "confidentialityImpact": "LOW"}, "impactScore": 1.4, "exploitabilityScore": 0.9}]}, "published": "2026-02-21T08:16:11.827", "references": [{"url": "https://github.com/bigbluebutton/bigbluebutton/commit/3aa47832bc2b17178799bd932453c226e8f95703", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-6gj9-5rhm-68j8", "tags": ["Patch", "Vendor Advisory"], "source": "security-advisories@github.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Primary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-200"}]}], "descriptions": [{"lang": "en", "value": "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."}, {"lang": "es", "value": "BigBlueButton es un aula virtual de c\u00f3digo abierto. En las versiones 3.0.19 e inferiores, al unirse por primera vez a una sesi\u00f3n con el micr\u00f3fono silenciado, el cliente env\u00eda audio al servidor independientemente del estado de silencio. Los medios se descartan en el lado del servidor, por lo que no es audible para ning\u00fan participante, pero esto puede permitir a operadores de servidor maliciosos acceder a datos de audio. El comportamiento solo es incorrecto entre unirse a la reuni\u00f3n y la primera vez que el usuario quita el silencio. Este problema ha sido solucionado en la versi\u00f3n 3.0.20."}], "lastModified": "2026-02-26T18:54:09.117", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:bigbluebutton:bigbluebutton:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "FC6C16D8-2543-43E9-8F1B-632501E23028", "versionEndExcluding": "3.0.20"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}