CVE-2026-25586
CRITICAL SEVERITYCVSS Score & Metrics
Base Score
10.0 / 10
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Vulnerability Description
SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, a sandbox escape is possible by shadowing hasOwnProperty on a sandbox object, which disables prototype whitelist enforcement in the property-access path. This permits direct access to __proto__ and other blocked prototype properties, enabling host Object.prototype pollution and persistent cross-sandbox impact. This vulnerability is fixed in 0.8.29.
Vulnerability Details
Published Date
Last Modified
CWE ID
CWE-74
Source
GitHub
Vendor
npm
Product
@nyariv/sandboxjs
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