Description

Hashgraph Guardian through version 3.5.1, fixed in commit 45fbe2f, contains an unsandboxed JavaScript execution vulnerability in the Custom Logic policy block worker that allows authenticated Standard Registry users to execute arbitrary code by passing user-supplied JavaScript expressions directly to the Node.js Function() constructor without isolation. Attackers can import native Node.js modules to read arbitrary files from the container filesystem, access process environment variables containing sensitive credentials such as RSA private keys, JWT signing keys, and API tokens, and forge valid authentication tokens for any user including administrators.

INFO

Published Date :

2026-04-09T17:57:20.440Z

Last Modified :

2026-05-01T16:56:16.826Z

Source :

VulnCheck
AFFECTED PRODUCTS

The following products are affected by CVE-2026-39911 vulnerability.

Vendors Products
Hashgraph
  • Guardian
Hedera
  • Guardian
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-39911.

URL Resource
https://github.com/hashgraph/guardian/commit/45fbe2f7e0e8feee30105d42d66ed63fb6177ebe cve-icon cve-icon
https://github.com/hashgraph/guardian/pull/5929 cve-icon cve-icon
https://www.vulncheck.com/advisories/hashgraph-guardian-unsandboxed-javascript-execution-rce cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
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Privileges Required
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SS Confidentiality
SS Integrity
SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact