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CRITICAL severity

GHSA-6pw2-5hjv-9pf7

CRITICALFix: patriksimek/vm2@532120d

GHSA-6pw2-5hjv-9pf7 is a critical-severity (CVSS 9.8) remote code execution vulnerability in vm2. 1 public exploit reference exists, so weaponization risk is real. O3 Security confirms whether GHSA-6pw2-5hjv-9pf7 is actually reachable in your code before you act, and blocks exploitation at runtime until you patch.

Sandbox bypass in vm2

Also known asCVE-2021-23555SNYK-JS-VM2-2309905
Published
Feb 12, 2022
Updated
Jul 8, 2026
Affected
1 pkg
Patched
1 / 1
Exploits
1 known
Exploitation data as of Jul 8, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

Real-World Exposure

1 pkg affected

How broadly this vulnerability is actually deployed: weekly install volume shows current usage, a proxy for how much of the ecosystem is exposed.

vm2npm
1.2Mdownloads / week

Description

The package vm2 before 3.9.6 are vulnerable to Sandbox Bypass via direct access to host error objects generated by node internals during generation of a stacktraces, which can lead to execution of arbitrary code on the host machine.

Affected Packages

1 total 1 fixed
EcosystemPackageVulnerable rangeFix
📦npmvm2all versions3.9.6
Exploits & PoCs
1

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for vm2. O3's reachability analysis confirms whether the vulnerable code path is actually invoked in your application, so you act on real exposure instead of every transitive match.

  2. Fix

    Update vm2 to 3.9.6 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms GHSA-6pw2-5hjv-9pf7 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

  4. How O3 protects you

    O3 pinpoints whether GHSA-6pw2-5hjv-9pf7 is reachable in your code and exactly where to fix it, then blocks exploitation in production at runtime until the patched version is deployed.

Tailored to GHSA-6pw2-5hjv-9pf7. Runtime protection reduces exposure until a permanent patch is applied and verified — it complements patching, it doesn't replace it.

Frequently Asked Questions

The package vm2 before 3.9.6 are vulnerable to Sandbox Bypass via direct access to host error objects generated by node internals during generation of a stacktraces, which can lead to execution of arbitrary code on the host machine.
O3 Security · Impact-Aware SCA

Is GHSA-6pw2-5hjv-9pf7 in your dependencies?

O3 detects GHSA-6pw2-5hjv-9pf7 across npm dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

GHSA-6pw2-5hjv-9pf7: Sandbox bypass in… | O3 Security