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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.

PUBLISHED Reserved 2026-02-16 | Published 2026-03-13 | Updated 2026-03-13 | Assigner GitHub_M




CRITICAL: 10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Problem types

CWE-94: Improper Control of Generation of Code ('Code Injection')

Product status

< 0.8.34
affected

References

github.com/...dboxJS/security/advisories/GHSA-6r9f-759j-hjgv

cve.org (CVE-2026-26954)

nvd.nist.gov (CVE-2026-26954)

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