---
cve: "CVE-2026-43999"
severity: "CRITICAL"
cvss: 9.9
epss: "1%"
vendor: "patriksimek"
kev: false
exploited: false
published: "2026-05-13 18:16:16"
tags: [cve, security, critical]
source: tsecurity.de CVE-Dossier
exported: "2026-10-27T14:11:35+01:00"
---

# CVE-2026-43999

> 9.9 CRITICAL · 🧪 PoC

## Beschreibung

vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, NodeVM's builtin allowlist can be bypassed when the module builtin is allowed (including via the '*' wildcard). The module builtin exposes Node's Module._load(), which loads any module by name directly in the host context, completely bypassing vm2's builtin restriction. This allows sandboxed code to load excluded builtins like child_process and achieve remote code execution. This vulnerability is fixed in 3.11.0.

## CNA-Record (Kanon, cvelistV5)

- CNA: **GitHub_M**
- State: PUBLISHED
- Stand: 2026-09-07 12:05:02
- CNA-CVSS: **9.9** (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H`)

## CISA-Anreicherung (vulnrichment/ADP)

- CISA-SSVC (Coordinator, v2.0.3):
  - Exploitation: **poc**
  - Automatable: **no**
  - Technical Impact: **total**

## CVSS-Vektor

```
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
```

| Metrik | Wert | Bewertung |
|---|---|---|
| AV Angriffsvektor | Netzwerk | bad |
| AC Komplexität | Gering | bad |
| PR Privilegien | Gering | warn |
| UI Interaktion | Keine | bad |
| S Scope | Verändert | bad |
| C Vertraulichkeit | Hoch | bad |
| I Integrität | Hoch | bad |
| A Verfügbarkeit | Hoch | bad |

## Schwachstellen-Klasse

- **CWE-829** — Inclusion of Functionality from Untrusted Control Sphere
  The product imports, requires, or includes executable functionality (such as a library) from a source that is outside of the intended control sphere.

## Angriffsmuster (CAPEC)

- [CAPEC-175 — Code Inclusion](https://capec.mitre.org/data/definitions/175.html) _(Severity: Very High)_
- [CAPEC-201 — Serialized Data External Linking](https://capec.mitre.org/data/definitions/201.html) _(Severity: High)_
- [CAPEC-228 — DTD Injection](https://capec.mitre.org/data/definitions/228.html) _(Severity: Medium)_
- [CAPEC-251 — Local Code Inclusion](https://capec.mitre.org/data/definitions/251.html) _(Severity: Medium)_
- [CAPEC-252 — PHP Local File Inclusion](https://capec.mitre.org/data/definitions/252.html) _(Severity: Medium)_
- [CAPEC-253 — Remote Code Inclusion](https://capec.mitre.org/data/definitions/253.html)
- [CAPEC-263 — Force Use of Corrupted Files](https://capec.mitre.org/data/definitions/263.html) _(Severity: Medium)_
- [CAPEC-538 — Open-Source Library Manipulation](https://capec.mitre.org/data/definitions/538.html) _(Severity: High)_

## ATT&CK-Techniken

- [T1055 — Process Injection](https://attack.mitre.org/techniques/T1055/)
- [T1195.001 — Supply Chain Compromise: Software Dependencies and Developme](https://attack.mitre.org/techniques/T1195/001/)

## Patch verfügbar (OSV)

- fca270df73b64a88e2f9ce71ac17663b6eaf814e (Commit)

## BSI-Hinweise (deutsch)

- [vm2: Mehrere Schwachstellen](https://wid.cert-bund.de/portal/wid/sicherheitshinweis/WID-SEC-W-2026-1349) — _BSI-Einstufung: kritisch_
  Ein Angreifer kann mehrere Schwachstellen in vm2 ausnutzen, um beliebigen Programmcode auszuführen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, und um Sicherheitsvorkehrungen zu umgehen.

## Referenzen

- <https://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8>
- <https://access.redhat.com/errata/RHSA-2026:50850>
- <https://access.redhat.com/security/cve/CVE-2026-43999>
- <https://bugzilla.redhat.com/show_bug.cgi?id=2477196>
- <https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43999.json>

---
_Exportiert aus dem [tsecurity.de CVE-Dossier](https://tsecurity.de/sicherheitsluecken/cve-2026-43999/) · Datenquellen: EUVD (ENISA), NVD, OSV, CISA KEV, FIRST EPSS, Exploit-DB, BSI WID (CSAF)_