CVE-2025-34146
nyariv sandboxjs 0.8.23 Prototype Pollution Sandbox Escape DoS
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1321 |
| Vendor | nyariv |
| Product | sandboxjs |
| Published | Jul 31, 2025 |
| Last Updated | Mar 23, 2026 |
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Affected Versions
nyariv / sandboxjs
* ≤ 0.8.23
References
gist.github.com: https://gist.github.com/Hagrid29/9df27829a491080f923c4f6b8518d7e3 github.com: https://github.com/nyariv/SandboxJS/issues/31 npmjs.com: https://www.npmjs.com/package/@nyariv/sandboxjs vulncheck.com: https://www.vulncheck.com/advisories/nyariv-sandboxjs-prototype-pollution-sandbox-escape-dos
Credits
Hagrid29