CVE-2025-34146 — nyariv sandboxjs 0.8.23 Prototype Pollution Sandbox Escape DoS
A prototype pollution vulnerability exists in @nyariv/sandboxjs versions <= 0.8.23, allowing attackers to inject arbitrary properties into Object.prototype via crafted JavaScrip…
Published: 2025-07-31 · CVSS: 7.0 · CVSS 4.0
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7