Security Advisory
CVE-2026-46404
6.8
MEDIUM
Vulnerability Description
BigBlueButton is an open-source virtual classroom. Prior to 3.0.23, the presentation URL validation did not properly restrict access to site local and link local addresses. The redirect following logic now pins resolved IPs. This issue is fixed in version 3.0.23.
Published Date
July 16, 2026
Official Source
NIST NVD Advisory