Is CVE-2026-46404 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-46404?

CVE-2026-46404 has a CVSS v3 severity of MEDIUM (6.8).

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CVE-2026-46404

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.