Is this vulnerability remotely exploitable?

It can be, if an attacker can supply or influence JavaScript executed inside SandboxJS—such as through user-generated scripts, plugin systems, or configuration-driven code. In such cases, remote inputs can translate into sandbox escapes and remote code execution.

Does exploitation require authenticated access?

It depends on how SandboxJS is integrated. If only authenticated users can provide scripts to the sandbox, then authentication is required; if any external party can submit code that is run in the sandbox, then unauthenticated remote exploitation may be possible.

What is the safest general fix pattern?

The safest pattern is to ensure that sandboxed code cannot reach powerful host objects or reflective prototype APIs, and to run untrusted code in isolated, least-privileged processes or containers. Limiting exposed capabilities and enforcing strict boundaries at both the library and process levels significantly reduces risk.

Severity:

CRITICAL RISK

(10.0)

Code Injection via Prototype Access (CWE-94) in SandboxJS JavaScript Sandbox

CVE-2026-25142

Published:

Feb 2, 2026

Status:

Analyzed

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

NDV

Recent Vulnerabilities

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

Remote Code Execution on the Router

April 6, 2026

CWE-77;CWE-78

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Remote Code Execution on Router Firmware

April 6, 2026

Vulnerability Type

Category:

Code Injection / Sandbox Escape

CWE:

CWE-94;CWE-1321

Impact:

Remote Code Execution via Sandbox Escape

Severity:

CRITICAL RISK

(10.0)

CVSS Version:

3.1

Vulnerability Type

Category:

Code Injection / Sandbox Escape

CWE:

CWE-94;CWE-1321

Impact:

Remote Code Execution via Sandbox Escape

Severity:

CRITICAL RISK

(10.0)

CVSS Version:

3.1

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Code Injection via Prototype Access (CWE-94) in SandboxJS JavaScript Sandbox

Summary

Affected Context

Exploit Preconditions

Why This Happens

Potential Impact

General Mitigation Guidance

How Teams Detect Issues Like This

Frequently Asked Questions

Source

Recent Vulnerabilities

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setGameSpeedCfg CGI Handler

HIGH RISK

HIGH

(7.3)

OS Command Injection (CWE-78) in Totolink A7100RU setFirewallType Handler

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

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