CVE-2026-39911

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Source
https://cve.org/CVERecord?id=CVE-2026-39911
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-39911.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-39911
Published
2026-04-09T17:57:20.440Z
Modified
2026-07-08T08:13:05.942860088Z
Severity
  • 8.7 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N CVSS Calculator
Summary
Hashgraph Guardian 3.5.1 Unsandboxed JavaScript Execution RCE
Details

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.

Database specific 
{
    "cna_assigner": "VulnCheck",
    "cwe_ids": [
        "CWE-668"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/39xxx/CVE-2026-39911.json"
}
References

Affected packages

Git / github.com/hashgraph/guardian

Affected ranges

Type
GIT
Repo
https://github.com/hashgraph/guardian
Events
Introduced
0 Unknown introduced commit / All previous commits are affected
Fixed
45fbe2f7e0e8feee30105d42d66ed63fb6177ebe
Database specific 
{
    "extracted_events": [
        {
            "introduced": "0"
        },
        {
            "last_affected": "3.5.0"
        }
    ],
    "cpe": "cpe:2.3:a:hedera:guardian:*:*:*:*:*:*:*:*",
    "source": [
        "CPE_RANGE",
        "REFERENCES"
    ]
}

Affected versions

3.*
3.4.0
v1.*
v1.0.0
v1.0.0-beta.1
v2.*
v2.24.0
v2.24.1
v2.25.0
v2.25.1
v2.26.0
v2.26.1
v2.26.2
v2.27.0
v2.27.1
v3.*
v3.0.0
v3.1.0
v3.1.0-RC
v3.1.1
v3.2.0
v3.2.0-RC
v3.2.0-rc
v3.3.0
v3.3.0-rc
v3.4.0-rc

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-39911.json"