SEPTEMBER 8, 2026
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Case File

CVE-2026-46351

HIGH · CVSS 8.1 EPSS 0.26% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-07-16 · Last synced 2026-08-15

CyberRota Analysis

AI-Generated

BigBlueButton versions prior to 3.0.21 are vulnerable due to the generation of conference session tokens with weak randomness, enabling users to predict and impersonate other users' tokens. This vulnerability poses a significant risk of unauthorized access and session hijacking within virtual classrooms. Organizations using affected versions should prioritize upgrading to 3.0.21 to mitigate potential security breaches.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-46351
Severity
HIGH
CVSS
8.1
EPSS
0.26%
Java

Original NVD Description

BigBlueButton is an open-source virtual classroom. Prior to 3.0.21, bbb-web generated conference sessionToken values with insufficiently secure randomness in bbb-common-web/src/main/java/org/bigbluebutton/api/Util.java and bigbluebutton-web/grails-app/controllers/org/bigbluebutton/web/controllers/ApiController.groovy, allowing a session user to predict other users' conference session tokens and impersonate them. This issue is fixed in version 3.0.21.