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CVE-2026-25587

CRITICAL CVSS: 10.0 Published: 2026-02-06 Modified: 2026-06-17

Description

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.29, as Map is in SAFE_PROTOYPES, it's prototype can be obtained via Map.prototype. By overwriting Map.prototype.has the sandbox can be escaped. This vulnerability is fixed in 0.8.29.

Affected Platforms

Nyariv Sandboxjs

Weakness Type

CWE-94

References