Is CVE-2026-27736 actively exploited?

CVE-2026-27736 has no public evidence of in-the-wild exploitation as of 2026-03-05.

What is the CVSS score for CVE-2026-27736?

CVE-2026-27736 has a CVSS score of 6.1 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

How do I patch CVE-2026-27736?

Patch guidance is available from bigbluebutton security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2026-27736.

Which products are affected by CVE-2026-27736?

1 product: bigbluebutton bigbluebutton.

CVE-2026-27736 - remediation guidance & executive summary

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack Vector: network
Complexity: low
Privileges: none
User Action: required
Scope: changed
Confidentiality: low
Integrity: low
Availability: none
Weaknesses: CWE-601

Metadata

Primary Vendor: BIGBLUEBUTTON
Published: 2/25/2026
Last Modified: 3/5/2026
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

bigbluebutton : bigbluebutton

Remediation Guidance

Executive Summary

Cite this page

CVE-2026-27736. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2026-27736

View on NIST NVD

CVE-2026-27736 vulnerability