CVE-2026-44006Public exploitNetwork attack vector

Host code execution via leaked proxy handler

Published May 13, 2026 · Updated May 13, 2026

Code injection in Patrik Simek vm2 before 3.11.0 allows attackers to escape the sandbox via crafted JavaScript and execute host code. The util.inspect path exposes BaseHandler, whose getPrototypeOf trap accepts a forged target and walks host prototypes until the host Function constructor becomes reachable. Any application that evaluates attacker-controlled code in the affected sandbox exposes the embedding Node.js process to arbitrary command execution.

CVSS severity10.0
Critical
EPSS probability0.81%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Code injection in Patrik Simek vm2 before 3.11.0 allows attackers to escape the sandbox via crafted JavaScript and execute host code. The util.inspect path exposes BaseHandler, whose getPrototypeOf trap accepts a forged target and walks host prototypes until the host Function constructor becomes reachable. Any application that evaluates attacker-controlled code in the affected sandbox exposes the embedding Node.js process to arbitrary command execution.

The record

CVE
CVE-2026-44006
Published
May 13, 2026
Updated
May 13, 2026
Vendor
Patrik Simek
Product
vm2
Classifications
CWE-94, CWE-914, T1059.007
Attack vector
network
Privileges
unauthenticated

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

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Is a vulnerable build present?

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

  1. Affected versionversion=< 3.11.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Patrik Simek · vm2version=< 3.11.0

Published CVSS scores

10.0Red HatCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
10.0GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-94Improper Control of Generation of Code ('Code Injection')
CWE-914Improper Control of Dynamically-Identified Variables
T1059.007JavaScript/JScript

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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