{"apiVersion":"1.0","identifier":"CVE-2026-55489","description":"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.","publishedAt":"2026-08-20T22:17:22","lastModifiedAt":"2026-08-21T12:16:28","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-55489","cvssScore":4.9,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L","epssProbability":0.00193,"riskScore":0.5,"affectedProduct":"BigBlueButton","affectedVersions":"<3.0.29","vulnerabilityType":"Web app","operatingSystems":[],"links":{"self":"https://www.redsauce.net/api/cves/CVE-2026-55489","webPages":{"es":"https://www.redsauce.net/es/cves/CVE-2026-55489","en":"https://www.redsauce.net/en/cves/CVE-2026-55489","fr":"https://www.redsauce.net/fr/cves/CVE-2026-55489","pt":"https://www.redsauce.net/pt/cves/CVE-2026-55489","de":"https://www.redsauce.net/de/cves/CVE-2026-55489","sk":"https://www.redsauce.net/sk/cves/CVE-2026-55489","el":"https://www.redsauce.net/el/cves/CVE-2026-55489"},"source":"https://nvd.nist.gov/vuln/detail/CVE-2026-55489"}}