CVE-2026-46404CWE-918

BigBlueButton: Presentation URL Security Hardening

Medium · published July 16, 2026

CVSS v3.1
6.8
EPSS
0%
Percentile
36.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.8 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.00435 · 36.7th percentile
Weakness
CWE-918 · Server-Side Request Forgery (SSRF)
Published
2026-07-16T18:04Z
EPSS history
Timeline
  • 16 JUL 18:04Z
    BigBlueButton: Presentation URL Security Hardening
    cvelistv5