Vulnerability · Published Apr 21, 2026 · Assigned by GitHub_M
CVE-2026-41126BigBlueButton has Open Redirect through bigbluebutton/api/join via get-parameter "logoutURL"
Medium 4.3
In plain English
A medium-severity open redirect in bigbluebutton from bigbluebutton. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 14% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.2%top 86.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| bigbluebutton | bigbluebutton | < 3.0.24 |
Weakness: CWE-601 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N