CVE-2026-41586
Critical
Description
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.
SeverityCritical
CVSS9.8
Exploit probability—
Product
Hyperledger Fabric
PublishedMay 7, 2026
First seenMay 7, 2026
Weakness typeCWE-502Deserialization of untrusted data
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| hyperledger fabric | 1.0.0 ≤ v ≤ 2.2.26 | — |
| org.hyperledger.fabric-sdk-java:fabric-sdk-javaMaven | 1.0.0 ≤ v ≤ 2.2.26 | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.