GitHub Advisoryadvisory · npm

GHSA-9qm3-6qrr-c76m @nyariv/sandboxjs has Prototype Pollution vulnerability that may lead to RCE

HIGH Published 2025-07-31 Modified 2025-07-31 Official page ↗
Aliases
CVE-2025-34146
Ecosystem
npm
Packages
@nyariv/sandboxjs
Severity
High
CVSS vector
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
Weaknesses
CWE-1321
Reviewed
2025-07-31

Affected packages

• npm @nyariv/sandboxjs: < 0.8.24 → fixed in 0.8.24

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.

Related

Alias · CVE (1)

  • CVE-2025-34146 A prototype pollution vulnerability exists in @nyariv/sandboxjs versions <= 0.8.23, allowing attackers to inject arbitrary properties into… vulnerability

Weakness · CWE (1)

  • CWE-1321 Improperly Controlled Modification of Object Prototype Attributes weakness

References