GHSA-c9wr-qm7p-p6vc

Suggest an improvement
Source
https://github.com/advisories/GHSA-c9wr-qm7p-p6vc
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-c9wr-qm7p-p6vc/GHSA-c9wr-qm7p-p6vc.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-c9wr-qm7p-p6vc
Withdrawn
2026-10-05T23:23:51Z
Published
2026-09-27T03:31:03Z
Modified
2026-10-05T23:30:04Z
Severity
  • 9.0 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H CVSS Calculator
  • 9.5 (Critical) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X CVSS Calculator
Summary
Duplicate Advisory: vm2: NodeVM custom resolution bypasses external path boundaries
Details

Duplicate Advisory

This advisory has been withdrawn because it is a duplicate of GHSA-5h3f-q97h-ccvc. This link is maintained to preserve external references.

Original Description

vm2 before 3.12.2 contains an authorization bypass in the NodeVM external-module resolver. When an embedder configures require.external with a custom resolver (and context: 'host'), LegacyResolver.customResolve in lib/resolver-compat.js records the resolved module directory in this.externals as new RegExp('^' + escapeRegExp(resolvedPath)), without requiring a path separator or end-of-string boundary. Untrusted guest code can therefore require the allowlisted module (e.g. foo) and then require the absolute path of a non-allowlisted sibling whose path merely shares the resolved prefix (e.g. .../node_modules/foo2/index.js); the sibling passes isPathAllowedForModule and is loaded through hostRequire, so its top-level code runs in the host process before the exports are wrapped with vm.readonly, resulting in a sandbox escape and arbitrary code execution in the host context.

Database specific 
{
    "cwe_ids": [
        "CWE-863"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-05T23:23:51Z",
    "nvd_published_at": "2026-09-27T02:17:17Z",
    "severity": "CRITICAL"
}
References

Affected packages

npm / vm2

Package

Name
vm2
View open source insights on deps.dev
Purl
pkg:npm/vm2

Affected ranges

Type
SEMVER
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
3.12.2

Database specific

source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-c9wr-qm7p-p6vc/GHSA-c9wr-qm7p-p6vc.json"