nyariv sandboxjs 0.8.23 Prototype Pollution Sandbox Escape DoS_CVE-2025-34146

7 / 10

HIGH

CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N

Description

A prototype pollution vulnerability exists in @nyariv/sandboxjs versions <= 0.8.23, allowing attackers to inject arbitrary properties into Object.prototype via crafted JavaScript code. This can result in a denial-of-service (DoS) condition or, under certain conditions, escape the sandboxed environment intended to restrict code execution. The vulnerability stems from insufficient prototype access checks in the sandbox’s executor logic, particularly in the handling of JavaScript function objects returned.

Basic Information

ID CVE-2025-34146

Source VulnCheck

Published Jul 31, 2025 at 14:59

Modified Jul 31, 2025 at 20:06

Affected Product

Vendor nyariv

Product sandboxjs

Version *

Affected Versions nyariv sandboxjs *

CWE Classification

CWE-1321

References

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    "published": "2025-07-31T14:59:35.716Z",
    "modified": "2025-07-31T20:06:52.349Z",
    "type": "cve",
    "title": "nyariv sandboxjs 0.8.23 Prototype Pollution Sandbox Escape DoS",
    "source": "VulnCheck",
    "references": "https://gist.github.com/Hagrid29/9df27829a491080f923c4f6b8518d7e3\nhttps://github.com/nyariv/SandboxJS/issues/31\nhttps://www.npmjs.com/package/@nyariv/sandboxjs\nhttps://www.vulncheck.com/advisories/nyariv-sandboxjs-prototype-pollution-sandbox-escape-dos",
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