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CVE-2026-27736

nvd nist
Published: Feb 25, 2026Modified: Mar 5, 2026

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6.1
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Exploitability: 2.8 / Impact: 2.7
Source: security-advisories@github.com (Secondary)

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.

Affected (1)

Bigbluebutton
1 product
Bigbluebutton
Configuration A
1 vulnerable
Vulnerable SoftwareAffected Versions
Bigbluebutton
Before 3.0.20

Related CWEs

CWE-601
URL Redirection to Untrusted Site ('Open Redirect')
A web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a Redirect. This simplifies phishing attacks.

References (2)

Source: security-advisories@github.com
Patch
Source: security-advisories@github.com
PatchVendor Advisory

Timeline

No history available yet.