CVE-2026-25520 - Vulnerability Details - OpenCVE

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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Changed

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Exploitation poc

Automatable yes

Technical Impact total

No data.

No data.

No data.

No data.

References

Link	Providers
https://github.com/nyariv/SandboxJS/commit/67cb186c41c78c51464f70405504e8ef0a6e43c3
https://github.com/nyariv/SandboxJS/security/advisories/GHSA-58jh-xv4v-pcx4

History

Fri, 06 Feb 2026 21:15:00 +0000

Type	Values Removed	Values Added
Metrics		ssvc `{'options': {'Automatable': 'yes', 'Exploitation': 'poc', 'Technical Impact': 'total'}, 'version': '2.0.3'}`

Fri, 06 Feb 2026 20:00:00 +0000

Type	Values Removed	Values Added
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.
Title		SandboxJS has a Sandbox Escape
Weaknesses		CWE-74
References		https://github.com/nyariv/SandboxJS/commit/67cb186c41c78c51464f70405504e8ef0a6e43c3 https://github.com/nyariv/SandboxJS/security/advisories/GHSA-58jh-xv4v-pcx4
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'}`

MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2026-02-06T19:53:24.219Z

Updated: 2026-02-06T20:18:08.646Z

Reserved: 2026-02-02T18:21:42.487Z

Link: CVE-2026-25520

Vulnrichment

Updated: 2026-02-06T20:17:55.302Z

NVD

Status : Received

Published: 2026-02-06T20:16:10.440

Modified: 2026-02-06T21:16:17.070

Link: CVE-2026-25520

Redhat

No data.

OpenCVE Enrichment

No data.

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