Is this vulnerability remotely exploitable?

Yes. If a web service, API, or application accepts user-supplied JavaScript (or logic that is compiled to JavaScript) and runs it inside SandboxJS, an attacker can exploit this issue remotely by providing crafted code that escapes the sandbox.

What level of access does an attacker need?

The attacker must be able to influence or supply code that executes within the SandboxJS environment. This might be through features like custom scripting, user-defined rules, plugin systems, or any configuration that is evaluated with the sandbox.

What is the safest general fix pattern?

Ensure that all function-related constructors (`Function`, `AsyncFunction`, `GeneratorFunction`, `AsyncGeneratorFunction`) and similar powerful built-ins are consistently wrapped, replaced, or blocked within the sandbox's mapping and property access logic. Additionally, structure the sandbox so that no reflective paths (like `.constructor` or prototype traversal) can reintroduce native constructors from the host context.

Severity:

CRITICAL RISK

(10.0)

Sandbox Escape via Unrestricted Async Function Construction (CWE-94) in SandboxJS

CVE-2026-23830

Published:

Jan 27, 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-78

CRITICAL RISK

CRITICAL

(9.9)

Command Injection in MCP Stdio Configuration Validation (CWE-78) in WeKnora

Remote Code Execution

March 7, 2026

CWE-89

CRITICAL RISK

CRITICAL

(9.9)

SQL Injection via PostgreSQL Array/Row Expressions (CWE-89) in WeKnora Query Engine

Remote Code Execution via SQL Injection on the Database Server

March 7, 2026

Vulnerability Type

Category:

Sandbox Escape / Code Injection

CWE:

CWE-94;CWE-693;CWE-913

Impact:

Remote Code Execution via Sandbox Bypass

Severity:

CRITICAL RISK

(10.0)

CVSS Version:

3.1

Vulnerability Type

Category:

Sandbox Escape / Code Injection

CWE:

CWE-94;CWE-693;CWE-913

Impact:

Remote Code Execution via Sandbox Bypass

Severity:

CRITICAL RISK

(10.0)

CVSS Version:

3.1

Catch This CVE While Code Is Being Written

Detect vulnerable code directly in pull requests, so CVEs are fixed before merge.

Get Started

Ship clean & secure code faster

START 14 DAYS FREE TRIAL

BOOK A DEMO

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Made with Love in San Francisco

355 Bryant St. San Francisco, CA 94107, USA

Ask AI for summary of CodeAnt

Sandbox Escape via Unrestricted Async Function Construction (CWE-94) in SandboxJS

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

CRITICAL RISK

CRITICAL

(9.9)

Command Injection in MCP Stdio Configuration Validation (CWE-78) in WeKnora

CRITICAL RISK

CRITICAL

(9.9)

SQL Injection via PostgreSQL Array/Row Expressions (CWE-89) in WeKnora Query Engine

Vulnerability Type

Vulnerability Type

Vulnerability Type

Catch This CVE While Code Is Being Written

Ship clean & secure code faster

Product

Pricing

Company

Legal

Developers

Compare

Product

Pricing

Company

Legal

Developers

Compare

Product

Pricing

Company

Legal

Developers

Compare