CVE-2026-25142 CRITICAL

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

Vendor Nyariv
Product SandboxJS
Weakness CWE-94 · Code injection
Published February 2, 2026
Last update February 4, 2026
View on NVD All CVEs

CVSS base score

10.0/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

February 2, 2026 CVE published
February 4, 2026 Record updated