Description

BigBlueButton is an open-source virtual classroom. In versions on the 3.x branch prior to 3.0.20, the string received with errorRedirectUrl lacks validation, using it directly in the respondWithRedirect function leads to an Open Redirect vulnerability. BigBlueButton 3.0.20 patches the issue. No known workarounds are available.

INFO

Published Date :

2026-02-25T16:27:01.507Z

Last Modified :

2026-02-26T21:33:41.504Z

Source :

GitHub_M
AFFECTED PRODUCTS

The following products are affected by CVE-2026-27736 vulnerability.

Vendors Products
Bigbluebutton
  • Bigbluebutton
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-27736.

URL Resource
https://github.com/bigbluebutton/bigbluebutton/commit/691f92f3af0d6b796b91cb968977068663119812 cve-icon cve-icon
https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-65cv-rg9f-qqrx cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact