CVE-2026-55489

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{"affected": [{"affectedData": [{"product": "bigbluebutton", "vendor": "bigbluebutton", "versions": [{"status": "affected", "version": "< 3.0.29"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "BigBlueButton is an open-source virtual classroom. Prior to 3.0.29, BigBlueButton presenters could submit a presentationId through /api/graphql that identified a presentation belonging to another meeting. akka-bbb-apps/src/main/scala/org/bigbluebutton/core/apps/presentationpod/RemovePresentationPubMsgHdlr.scala did not verify the presentation's meeting identifier before deletion, allowing a presenter who knew the identifier to delete another meeting's presentation and disrupt its availability. This issue is fixed in version 3.0.29."}, {"lang": "es", "value": "BigBlueButton es un aula virtual de c\u00f3digo abierto. Antes de la versi\u00f3n 3.0.29, los presentadores de BigBlueButton pod\u00edan enviar un presentationId a trav\u00e9s de /API/graphql que identificaba una presentaci\u00f3n perteneciente a otra reuni\u00f3n. akka-bbb-apps/src/main/scala/org/bigbluebutton/core/apps/presentationpod/RemovePresentationPubMsgHdlr.scala no verificaba el identificador de reuni\u00f3n de la presentaci\u00f3n antes de la eliminaci\u00f3n, permitiendo a un presentador que conoc\u00eda el identificador eliminar la presentaci\u00f3n de otra reuni\u00f3n y alterar su disponibilidad. Este problema est\u00e1 solucionado en la versi\u00f3n 3.0.29."}], "id": "CVE-2026-55489", "lastModified": "2026-10-26T10:10:00.140", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 4.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 2.7, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-55489", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-21T11:22:00.654095Z", "version": "2.0.3"}}]}, "published": "2026-08-20T22:17:22.200", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/bigbluebutton/bigbluebutton/commit/c9e93f9af07b9661e286d101b83cbccb891c551f"}, {"source": "security-advisories@github.com", "url": "https://github.com/bigbluebutton/bigbluebutton/releases/tag/v3.0.29"}, {"source": "security-advisories@github.com", "url": "https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-jxpq-r3h3-p75g"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}], "source": "security-advisories@github.com", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,3.0.29)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "bigbluebutton", "source": "cna", "vendor": "bigbluebutton"}, "product": "bigbluebutton", "vendor": "bigbluebutton"}], "created": "2026-08-20T22:30:05.837080+00:00", "updated": "2026-08-20T23:15:05.194789+00:00", "vendors": ["bigbluebutton", "bigbluebutton$PRODUCT$bigbluebutton"]}