---
title: "CVE-2026-47140: NodeVM builtin denylist bypass via process and inspector/promises allows host code execution"
url: https://erroneo.us/security/cve/CVE-2026-47140/
description: "CVE-2026-47140 (vm2 (npm)): vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, NodeVM blocks several dangerous Node.js builtins such as…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-06-12
date_modified: 2026-06-13
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-47140"
kev: false
cvss: 10
epss: 0.00823
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-47140: NodeVM builtin denylist bypass via process and inspector/promises allows host code execution

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.8% , percentile 57: FIRST’s model estimates a 0.8% chance of exploitation activity in the next 30 days, higher than 57% of all scored CVEs (moderate). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes vm2 (npm) <= 3.11.3, fixed in 3.11.4 . Check your lockfile, including transitive dependencies.

## What it is

vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, NodeVM blocks several dangerous Node.js builtins such as module, workerthreads, cluster, vm, repl, and inspector. However, the denylist misses process and inspector/promises. Both can be used from sandboxed code to reach host-side execution primitives. This allows sandboxed code to bypass the intended builtin restrictions and execute code in the host process. This issue has been patched in version 3.11.4.

## Affected packages

- npm `vm2` <= 3.11.3 → fixed: 3.11.4

## Affected products (CVE record)

- patriksimek vm2: < 3.11.4

## Severity

- GitHub_M CVSS 3.1: 10 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`
- GitHub CVSS 3.1: 10.0 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.82% probability of exploitation activity in the next 30 days; percentile 57.

## Sources

- [GitHub Advisory GHSA-rp36-8xq3-r6c4](https://github.com/advisories/GHSA-rp36-8xq3-r6c4)
- [CVE.org record CVE-2026-47140](https://www.cve.org/CVERecord?id=CVE-2026-47140)
- [NVD entry CVE-2026-47140](https://nvd.nist.gov/vuln/detail/CVE-2026-47140)
- [github.com](https://github.com/patriksimek/vm2/security/advisories/GHSA-rp36-8xq3-r6c4)
- [github.com](https://github.com/patriksimek/vm2/commit/a1ed47a98d1cc36cb48c0d566d55889688e0b59b)
- [github.com](https://github.com/patriksimek/vm2/releases/tag/v3.11.4)

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Source page: https://erroneo.us/security/cve/CVE-2026-47140/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt