Is CVE-2026-27736 actively exploited?

No active exploitation of CVE-2026-27736 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-27736 be exploited remotely?

Yes. CVE-2026-27736 is exploitable remotely over the network (CVSS attack vector: Network).

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

CVE-2026-27736 has a CVSS score of 6.1 (MEDIUM) and an EPSS exploitation probability of 0.03%.

HOME VULNERABILITIESCVE-2026-27736

MEDIUM

CVE-2026-27736

CWE-601Published: February 25, 2026· Updated: Feb 27, 2026

6.1

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:7.3th

Official 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.

NVD Source

Technical Analysis

CVE-2026-27736 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

The vulnerability has a "Changed" scope, meaning successful exploitation can impact components beyond the vulnerable component itself — such as the host operating system or adjacent services.