CVE-2026-25142: SandboxJS Vulnerable to Prototype Pollution -> Sandbox Escape -> RCE

Severity: Critical

CVSS Score: 10

SandboxJS is a JavaScript sandboxing library. Prior to 0.8.27, SanboxJS does not properly restrict __lookupGetter__ which can be used to obtain prototypes, which can be used for escaping the sandbox / remote code execution. This vulnerability is fixed in 0.8.27.