CVE-2026-41126 — MEDIUM (4.3)

Vulnerability Description

BigBlueButton is an open-source virtual classroom. Versions prior to 3.0.24 have an Open Redirect through bigbluebutton/api/join via get-parameter "logoutURL." Version 3.0.24 has adjusted the handling of requests with incorrect checksum so that the default logoutURL is used. No known workarounds are available.

CVSS Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

UNCHANGED

Confidentiality

LOW

Integrity

NONE

Availability

NONE

Related Weaknesses (CWE)

CWE-601

References

https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-cvwj-4pc

FAQ

What is CVE-2026-41126?

CVE-2026-41126 is a vulnerability with a CVSS score of 4.3 (MEDIUM). BigBlueButton is an open-source virtual classroom. Versions prior to 3.0.24 have an Open Redirect through bigbluebutton/api/join via get-parameter "logoutURL." Version 3.0.24 has adjusted the handling...

How severe is CVE-2026-41126?

CVE-2026-41126 has been rated MEDIUM with a CVSS base score of 4.3/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-41126?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.