CVE-2026-25586 - SandboxJS has a Sandbox Escape via Prototype Whitelist Bypass and Host Prototype...

CVE ID : CVE-2026-25586 Published : Feb. 6, 2026, 8:16 p.m. | 29 minutes ago 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. Severity: 10.0 | CRITICAL Visit the link for more details, such as CVSS details, affected products, timeline, and more...