CVE-2021-43667: Linuxfoundation Fabric

High severity, CVSS 7.5. EPSS: 1.3% chance of exploitation in the next 30 days.

A vulnerability has been detected in HyperLedger Fabric v1.4.0, v2.0.0, v2.1.0. This bug can be leveraged by constructing a message whose payload is nil and sending this message with the method 'forwardToLeader'. This bug has been admitted and fixed by the developers of Fabric. If leveraged, any leader node will crash.

Affected products

• Linuxfoundation Fabric: version 1.4.0 only; version 2.0.0 only; version 2.1.0 only

Published 2021-11-18. Last modified 2026-06-17.