CVE-2026-41586: Hyperledger Fabric

Critical severity, CVSS 9.8. EPSS: 0.6% chance of exploitation in the next 30 days.

Hyperledger Fabric is an enterprise-grade permissioned distributed ledger framework for developing solutions and applications. From versions 1.0.0 to 2.2.26, Channel.java implements readObject() and exposes deSerializeChannel() which call ObjectInputStream.readObject() on untrusted byte arrays without configuring an ObjectInputFilter. This is a classic Java deserialization RCE pattern. At time of publication, there are no publicly available patches.

Affected products

• Hyperledger Fabric: from 1.0.0, up to and including 2.2.26

Published 2026-05-07. Last modified 2026-08-25.