CVE-2026-25587: @nyariv/sandboxjs has a Sandbox Escape vulnerability

Severity: Critical

CVSS Score: 10

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.