CVE-2026-25520

@nyariv/sandboxjs has a Sandbox Escape issue

Published 6 Feb 2026Modified 17 Jun 2026CWE 74

In the Trivy database since at least 24 Oct 2026, 07:11 UTCWhen it arrived before that build is not recorded.

Severity by source

GHSA10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Trivy's own label is CRITICAL. Rated critical by GHSA.

Description

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, The return values of functions aren't wrapped. Object.values/Object.entries can be used to get an Array containing the host's Function constructor, by using Array.prototype.at you can obtain the hosts Function constructor, which can be used to execute arbitrary code outside of the sandbox. This vulnerability is fixed in 0.8.29.

Affected packages and fixed versions

Source	Package	Fixed in
npm::GitHub Security Advisory npm	@nyariv/sandboxjs	0.8.29

References

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