PT-2026-34217 · Unknown · Bigbluebutton

Published 2026-04-21 · Updated 2026-04-25 · CVE-2026-41126

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions BigBlueButton versions prior to 3.0.24

Description An open redirect exists in the 'bigbluebutton/api/join' endpoint through the logoutURL parameter. This occurs when requests with incorrect checksums are handled improperly, allowing a redirect to an arbitrary external location.

Recommendations Update to version 3.0.24.

Fix

Open Redirect

Weakness Enumeration

CWE-601

Related Identifiers

CVE-2026-41126

Affected Products

Bigbluebutton

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-41126 · Security Note
• https://github.com/bigbluebutton/bigbluebutton/security/advisories/GHSA-cvwj-4pcp-f3g8 · Note
• https://twitter.com/VulmonFeeds/status/2046838115944354134 · Twitter Post
• https://twitter.com/infoflowcloud/status/2048169311366242451 · Twitter Post
• https://twitter.com/CVEnew/status/2048168406210531619 · Twitter Post