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CVE-2026-39911

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CVE-2026-39911

Published: Apr 9, 2026

Modified: May 1, 2026

PUBLISHED

CVSS v3.1

8.8

HIGH

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.

VendorProductVersions

hashgraph

guardian

affected
0 - <= 3.5.1
unaffected
45fbe2f7e0e8feee30105d42d66ed63fb6177ebe

Weaknesses (CWE)

CWE-668

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

References

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