{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-55489", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-06-16T22:28:27.062Z", "datePublished": "2026-08-20T21:36:35.127Z", "dateUpdated": "2026-08-20T21:36:35.127Z"}, "containers": {"cna": {"title": "BigBlueButton: IDOR on BBB through /api/graphql via POST parameter \"presentationId\" leads to Authentication Bypass", "problemTypes": [{"descriptions": [{"cweId": "CWE-639", "lang": "en", "description": "CWE-639: Authorization Bypass Through User-Controlled Key", "type": "CWE"}]}], "metrics": [{"cvssV3_1": {"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"}}], "references": [{"name": "https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-jxpq-r3h3-p75g", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-jxpq-r3h3-p75g"}, {"name": "https://github.com/bigbluebutton/bigbluebutton/commit/c9e93f9af07b9661e286d101b83cbccb891c551f", "tags": ["x_refsource_MISC"], "url": "https://github.com/bigbluebutton/bigbluebutton/commit/c9e93f9af07b9661e286d101b83cbccb891c551f"}, {"name": "https://github.com/bigbluebutton/bigbluebutton/releases/tag/v3.0.29", "tags": ["x_refsource_MISC"], "url": "https://github.com/bigbluebutton/bigbluebutton/releases/tag/v3.0.29"}], "affected": [{"vendor": "bigbluebutton", "product": "bigbluebutton", "versions": [{"version": "< 3.0.29", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-08-20T21:36:35.127Z"}, "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."}], "source": {"advisory": "GHSA-jxpq-r3h3-p75g", "discovery": "UNKNOWN"}}}}

{}

{"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."}], "id": "CVE-2026-55489", "lastModified": "2026-08-20T22:17:22.200", "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"}]}, "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": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-639"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"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": "2026-08-20T22:30:05.837124+00:00", "vendors": ["bigbluebutton", "bigbluebutton$PRODUCT$bigbluebutton"]}