CVE-2026-44007Public exploitNetwork attack vector

Host command execution via nested NodeVM require bypass

Published May 13, 2026 · Updated May 13, 2026

Sandbox escape in Patrik Simek vm2 before 3.11.1 allows remote authenticated users to execute OS commands through crafted JavaScript. With nesting enabled, the legacy resolver injects vm2 despite require being false, allowing sandbox code to create an inner NodeVM that exposes child_process. Exploitation requires a host application to run attacker-supplied code in a NodeVM configured with nesting enabled.

CVSS severity9.1
Critical
EPSS probability0.96%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Sandbox escape in Patrik Simek vm2 before 3.11.1 allows remote authenticated users to execute OS commands through crafted JavaScript. With nesting enabled, the legacy resolver injects vm2 despite require being false, allowing sandbox code to create an inner NodeVM that exposes child_process. Exploitation requires a host application to run attacker-supplied code in a NodeVM configured with nesting enabled.

The record

CVE
CVE-2026-44007
Published
May 13, 2026
Updated
May 13, 2026
Vendor
Patrik Simek
Product
vm2
Classifications
CWE-1100, CWE-284, CWE-693, T1059
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 13, 2026CVE publishedPublication date reported by the CVE source.
  2. May 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.11.1

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

Patrik Simek · vm2version=< 3.11.1

Published CVSS scores

9.9Red HatCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
9.1GitHubCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-1100Insufficient Isolation of System-Dependent Functions
CWE-284Improper Access Control
CWE-693Protection Mechanism Failure
T1059Command and Scripting Interpreter

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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