VULNERABILITY INTELLIGENCE

CVE-2026-55489

CVSS score4.9 MEDIUM
EPSS probability0.31%
CISA KEVNot currently listed
Published2026-08-20
Last modified2026-10-26
CVSS vectorCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:L/A:L

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.

Weakness classification

  • security-advisories@github.com: CWE-639

Primary references