Open redirect in BigBlueButton - CVE-2026-27736

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Main Vulnerability Database Vulnerabilities #VU125911

Open redirect in BigBlueButton - CVE-2026-27736

Published: April 14, 2026


Vulnerability identifier: #VU125911
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-27736
CWE-ID: CWE-601
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Blindside Networks
Affected software:
BigBlueButton

Detailed vulnerability description

The vulnerability allows a remote attacker to redirect users to an untrusted site.

The vulnerability exists due to url redirection to an untrusted site in the ApiController respondWithRedirect function when handling the errorRedirectUrl parameter. A remote attacker can supply a crafted redirect URL to redirect users to an untrusted site.

User interaction is required for exploitation.


How to mitigate CVE-2026-27736

Install security update from vendor's website.

Sources