Improper Control of Dynamically-Managed Code Resources Affecting @nyariv/sandboxjs package, versions <0.8.26
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-JS-NYARIVSANDBOXJS-15123975
- published28 Jan 2026
- disclosed27 Jan 2026
- creditNight Wizard
Introduced: 27 Jan 2026
NewCVE-2026-23830 (opens in a new tab)How to fix?
Upgrade @nyariv/sandboxjs to version 0.8.26 or higher.
Overview
@nyariv/sandboxjs is a Javascript sandboxing library.
Affected versions of this package are vulnerable to Improper Control of Dynamically-Managed Code Resources via the AsyncFunction constructor not being properly isolated in the sandboxing function. An attacker can execute arbitrary code outside the intended sandbox environment by accessing the native AsyncFunction constructor through an async function's .constructor property and creating new functions that run in the global context.