---
id: GHSA-7c3p-84r8-h79q
title: >-
  Duplicate Advisory: vm2: NodeVM builtin denylist bypass via fs/promises
  despite -fs, allowing host filesystem writes
summary: >-
  Duplicate Advisory: vm2: NodeVM builtin denylist bypass via fs/promises
  despite -fs, allowing host filesystem writes
severity: high
cvss: 8.5
cwe:
  - CWE-269
vendor: vm2
product: vm2
ecosystem: npm
affected:
  - vm2 <= 3.11.6
published: '2026-09-17'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T15:36:34Z'
source: GHSA
sourceUrl: 'https://github.com/advisories/GHSA-7c3p-84r8-h79q'
references:
  - url: 'https://github.com/patriksimek/vm2/security/advisories/GHSA-6rh5-qq4q-97xh'
  - url: 'https://nvd.nist.gov/vuln/detail/CVE-2026-92958'
  - url: >-
      https://www.vulncheck.com/advisories/vm2-before-3.11.7-denylist-bypass-via-fs-promises
  - url: 'https://github.com/advisories/GHSA-7c3p-84r8-h79q'
tags:
  - ghsa
  - npm
ingestedAt: '2026-10-01T15:48:17.823Z'
---

## Overview

## Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-6rh5-qq4q-97xh. This link is maintained to preserve external references.

## Original Description
vm2 through 3.11.6 contains a builtin-module denylist bypass in NodeVM. When the embedder uses the builtin wildcard together with negative entries (e.g. require: { builtin: ['*', '-fs', '-child_process'] }), negative entries are matched by exact module name in lib/builtin.js, so -fs removes only the builtin named fs and does not remove builtin subpaths such as fs/promises. Sandboxed code can therefore call require('fs/promises') or require('node:fs/promises') and reach the promise-based filesystem API despite fs being denied; node: prefix handling is likewise inconsistent (a -node:fs/promises entry does not block require('fs/promises')). Host file creation and writing were confirmed via fsp.writeFile(), and other fs/promises operations (cp, mkdir, rename, rm, rmdir, truncate, read operations, etc.) are also reachable. This issue is fixed in vm2 3.11.7.

## Affected packages

- `vm2 <= 3.11.6`

## Remediation

Refer to the advisory for the patched release.