CVE-2025-34146 (GCVE-0-2025-34146)
Vulnerability from cvelistv5
Published
2025-07-31 14:59
Modified
2025-07-31 20:06
Severity ?
7.0 (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
CWE
  • CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Summary
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.
References
disclosure@vulncheck.comhttps://gist.github.com/Hagrid29/9df27829a491080f923c4f6b8518d7e3
disclosure@vulncheck.comhttps://github.com/nyariv/SandboxJS/issues/31
disclosure@vulncheck.comhttps://www.npmjs.com/package/@nyariv/sandboxjs
disclosure@vulncheck.comhttps://www.vulncheck.com/advisories/nyariv-sandboxjs-prototype-pollution-sandbox-escape-dos
Impacted products
Vendor Product Version
nyariv sandboxjs Version: *   ≤ 0.8.23
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