9.8

CVE-2026-41586: hyperledger fabric Deserialization of Untrusted Data

CVSS: 9.8v3.1CriticalAnalyzed
AliasesGHSA-prf8-cf2x-rhx7BIT-hyperledger-fabric-orderer-2026-41586BIT-hyperledger-fabric-peer-2026-41586
Published 07-05-2026Last modified 07-05-2026
Open JSON

Vulnerability summary

CVE-2026-41586 is a critical (CVSS 9.8) Deserialization of Untrusted Data vulnerability in hyperledger fabric. EPSS estimates a 0.63% chance of exploitation in the next 30 days, higher than 49.2% of scored vulnerabilities. 1 public exploit is recorded.

Overall risk
70/100
0100
High · default modelHow is this calculated?
CVSS score
9.8/10
010
Critical · v3.1 (NVD)
EPSS score
0.63%
0%100%
Low · +0.10 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits1github

Timeline

  1. 07-05-2026
    PublishedVulnerability first disclosed.
  2. 07-05-2026
    Last modifiedVulnerability information updated.

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 metrics

4 scores · 3 sources · 2 versions

EPSS trend

Probability

0.63%

Chance of exploitation in the next 30 days

Percentile

49%

Versus all other CVEs

30-day change

+0.10 pp

From 0.53% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.63%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

1 found
  • githubUnverified

    Fabric

    Maturity: poc

Weaknesses

CWE · root cause

Affected systems

Hyperledger1 product
Org.hyperledger.fabric-sdk-java1 product
  • fabric-sdk-java≥ 1.0.0, ≤ 2.2.26

2 vendors · 2 products

References

4 links