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CVE-2026-41586

Hyperledger Fabric insecure deserialization

9.8 CRITICALPublic exploitEPSS 0.63%
  1. Published7 May 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

Hyperledger Fabric≥ 1.0.0 ≤ 2.2.26

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2026-41586 being actively exploited?

CVE-2026-41586 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.63%.

How severe is CVE-2026-41586?

CVE-2026-41586 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.63% probability of exploitation.

Which products are affected by CVE-2026-41586?

Affected products include Hyperledger Fabric.

How do I fix CVE-2026-41586?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.