GHSA-mgj2-jqjq-q8gg: Duplicate Advisory Vm2: Host-returned Promise Rejection Can Vulnerability

CRITICAL
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CVSS 8.6
CWE-248
Published
Advisory Summary

GHSA-mgj2-jqjq-q8gg is a CRITICAL (CVSS 8.6) vm2: host-returned promise rejection can vulnerability (CWE-248: Uncaught Exception) affecting Duplicate Advisory libraries in the npm ecosystem. The issue involves vm2: host-returned promise rejection can bypass vm2's unhandled-rejection hardening and terminate the host process. Remediation is available in the latest vendor maintenance releases.

GHSA-mgj2-jqjq-q8gg at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-mgj2-jqjq-q8gg
Severity CRITICAL
CVSS v3.1 Base Score 8.6
CWE Classification CWE-248: Uncaught Exception
Affected Product Duplicate Advisory
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 8.6

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix GHSA-mgj2-jqjq-q8gg

To remediate this vulnerability, upgrade all affected Duplicate Advisory dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

vm2 fixed: Latest secure release 
npm install vm2@Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls vm2

How to Check if You Are Affected

To determine whether your Node.js application is affected by GHSA-mgj2-jqjq-q8gg, inspect your project dependencies using npm:

npm ls vm2

Analyze the terminal output to locate any version of Duplicate Advisory in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The npm ls vm2 command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-248: Uncaught Exception, where an exception is thrown from a function, but it is not caught. In Duplicate Advisory, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## Duplicate Advisory This advisory has been withdrawn because it is a duplicate of GHSA-gjq8-xm47-88rc. This link is maintained to preserve external references. ## Original Description vm2 is a sandbox library for running untrusted JavaScript in Node.js. In versions >= 3.10.0 and <= 3.11.7, Promises returned from the host realm into the sandbox are not marked as handled at the bridge boundary; only Promises created inside the sandbox are wrapped with a rejection-swallowing handler (lib/setup-sandbox.js), and the bridge only installs host-side rejection sanitizers when sandbox code calls .then/.catch/.finally. As a result, code running in the sandbox can invoke a host function that returns a rejected Promise (for example events.once() exposed via the NodeVM events builtin, or any embedder-provided Promise-returning API) and simply ignore the return value, leaving the host Promise unhandled so that Node.js's default unhandled-rejection behavior terminates the host process. This is an incomplete fix of GHSA-hw58-p9xv-2mjh. The issue is fixed in version 3.11.8.

GHSA-mgj2-jqjq-q8gg Affected Duplicate Advisory Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
vm2
npm/vm2
npm
≥ 3.10.0
≤ 3.11.7

References

GitHub Advisory / Wiki ADVISORY
https://github.com/patriksimek/vm2/security/advisories/GHSA-gjq8-xm47-88rc
NVD — GHSA-mgj2-jqjq-q8gg NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-92954
www.vulncheck.com/advisories/vm2-3.10... WEB
https://www.vulncheck.com/advisories/vm2-3.10.0-through-3.11.5-denial-of-service-via-host-promise

Frequently Asked Questions

What is GHSA-mgj2-jqjq-q8gg?
GHSA-mgj2-jqjq-q8gg is a security vulnerability in Duplicate Advisory involving vm2: Host-returned Promise rejection can bypass vm2's unhandled-rejection hardening and terminate the host process under CWE-248: Uncaught Exception.
Which Duplicate Advisory versions are affected?
Affected versions include releases prior to current release patches across affected packages: vm2.
What version fixes GHSA-mgj2-jqjq-q8gg?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is vm2 affected?
Yes, vm2 is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What is the CVSS score of GHSA-mgj2-jqjq-q8gg?
GHSA-mgj2-jqjq-q8gg has a CVSS v3.1 base score of 8.6 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
What CWE is associated with GHSA-mgj2-jqjq-q8gg?
GHSA-mgj2-jqjq-q8gg is classified under CWE-248: Uncaught Exception (An exception is thrown from a function, but it is not caught.).
How can I check npm dependencies for GHSA-mgj2-jqjq-q8gg?
Run the dependency tree command: 'npm ls vm2'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-mgj2-jqjq-q8gg",
  "modified" : "2026-10-05T22:45:31Z",
  "published" : "2026-09-17T15:32:16Z",
  "withdrawn" : "2026-10-05T22:45:31Z",
  "aliases" : [ ],
  "summary" : "Duplicate Advisory: vm2: Host-returned Promise rejection can bypass vm2's unhandled-rejection hardening and terminate the host process",
  "details" : "## Duplicate Advisory\n\nThis advisory has been withdrawn because it is a duplicate of GHSA-gjq8-xm47-88rc. This link is maintained to preserve external references.\n\n## Original Description\nvm2 is a sandbox library for running untrusted JavaScript in Node.js. In versions >= 3.10.0 and <= 3.11.7, Promises returned from the host realm into the sandbox are not marked as handled at the bridge boundary; only Promises created inside the sandbox are wrapped with a rejection-swallowing handler (lib/setup-sandbox.js), and the bridge only installs host-side rejection sanitizers when sandbox code calls .then/.catch/.finally. As a result, code running in the sandbox can invoke a host function that returns a rejected Promise (for example events.once() exposed via the NodeVM events builtin, or any embedder-provided Promise-returning API) and simply ignore the return value, leaving the host Promise unhandled so that Node.js's default unhandled-rejection behavior terminates the host process. This is an incomplete fix of GHSA-hw58-p9xv-2mjh. The issue is fixed in version 3.11.8.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/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"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "vm2"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "3.10.0"
      }, {
        "last_affected" : "3.11.7"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/patriksimek/vm2/security/advisories/GHSA-gjq8-xm47-88rc"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-92954"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/vm2-3.10.0-through-3.11.5-denial-of-service-via-host-promise"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-248" ],
    "severity" : "CRITICAL",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-10-05T22:45:31Z",
    "nvd_published_at" : "2026-09-17T14:18:01Z"
  }
}