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PatchSiren cyber security CVE debrief

CVE-2026-45581 hyperledger CVE debrief

CVE-2026-45581 is a vulnerability in fabric-chaincode-java, a Java-based implementation of Hyperledger Fabric chaincode shim APIs. Versions from 2.3.1 to before 2.5.10, when deployed in chaincode-as-a-service mode with TLS enabled, log the TLS private key password in plaintext at the INFO level. An attacker with access to these logs could recover the password and, if they also obtain the TLS private key, impersonate the chaincode server. This issue was patched in version 2.5.10.

Vendor
hyperledger
Product
fabric-chaincode-java
CVSS
MEDIUM 5.5
CISA KEV
Not listed in stored evidence
Original CVE published
2026-06-08
Original CVE updated
2026-07-23
Advisory published
2026-06-08
Advisory updated
2026-07-23

Who should care

Users of fabric-chaincode-java, especially those deploying it in chaincode-as-a-service mode with TLS enabled, should be aware of this vulnerability and take steps to mitigate it.

Technical summary

The vulnerability exists in fabric-chaincode-java versions 2.3.1 to before 2.5.10. When chaincode is deployed with TLS enabled, the INFO level server logs include the TLS private key password in plaintext. This allows an attacker with log access to recover the password and potentially impersonate the server if they also obtain the private key.

Defensive priority

MEDIUM

Recommended defensive actions

  • Upgrade to version 2.5.10 or later of fabric-chaincode-java.
  • Review and secure access to chaincode server logs.
  • Consider additional security measures to protect TLS private keys.

Evidence notes

The vulnerability was patched in version 2.5.10. For more information, see [ref-4](https://github.com/hyperledger/fabric-chaincode-java/security/advisories/GHSA-wg5x-3g47-v38r).

Sources and references

Verified primary and authoritative sources

  • CVE-2026-45581 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-45581

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-45581 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-45581

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.