SandboxJS is a JavaScript sandboxing library. Prior to 0.8.34, it is possible to obtain arrays containing Function, which allows escaping the sandbox. Given an array containing Function, and Object.fromEntries, it is possible to construct {[p]: Function} where p is any constructible property. This vulnerability is fixed in 0.8.34.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-6r9f-759j-hjgv SandboxJS affected by a Sandbox Escape
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Tue, 17 Mar 2026 20:15:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:nyariv:sandboxjs:*:*:*:*:*:node.js:*:*

Mon, 16 Mar 2026 17:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 16 Mar 2026 10:15:00 +0000

Type Values Removed Values Added
First Time appeared Nyariv
Nyariv sandboxjs
Vendors & Products Nyariv
Nyariv sandboxjs

Fri, 13 Mar 2026 16:15:00 +0000

Type Values Removed Values Added
Description SandboxJS is a JavaScript sandboxing library. Prior to 0.8.34, it is possible to obtain arrays containing Function, which allows escaping the sandbox. Given an array containing Function, and Object.fromEntries, it is possible to construct {[p]: Function} where p is any constructible property. This vulnerability is fixed in 0.8.34.
Title SandboxJS has a Sandbox Escape
Weaknesses CWE-94
References
Metrics cvssV3_1

{'score': 10, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-16T17:06:55.221Z

Reserved: 2026-02-16T22:20:28.611Z

Link: CVE-2026-26954

cve-icon Vulnrichment

Updated: 2026-03-16T17:06:45.533Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-13T19:54:31.143

Modified: 2026-03-17T20:13:06.470

Link: CVE-2026-26954

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-16T09:25:04Z

Weaknesses