CVE catalog
CVE-2026-43999
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 expose
- Severity
- Critical · CVSS 9.9
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.97% · Oct 25, 2026
A flaw was found in vm2 (before 3.11.0). When the module builtin is allowed (including via wildcard), sandboxed code can call Module._load() in the host context, bypassing the builtin allowlist and loading excluded modules such as child_process for remote code execution. Fixed in 3.11.0. vm2: vm2: Remote code execution via NodeVM builtin allowlist bypass vm2 NodeVM is vulnerable to builtin allowlist bypass through the module builtin exposing host Module._load(). An attacker with low privileges who can execute sandboxed code when module is permitted may load excluded host builtins and achieve remote code execution. Fixed in vm2 3.11.0. The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Cpe | vm2 | Not reported | 3.11.0 | fixed |
| Cpe | vm2 | Not reported | 3.11.0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Cpe | vm2 | cpe | Not reported | 3.11.0 | Not reported | Not reported | Not reported |
| Cpe | vm2 | cpe | Not reported | 3.11.0 | Not reported | NVD-CVE-2026-43999 | Not reported |
OpenFactory catalog packages
No matching packages in this catalog.
Observed:
References
- [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://github.com/patriksimek/vm2/security/advisories/GHSA-947f-4v7f-x2v8]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-43999]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43999.json]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-1349.json]
[CERT-Bund public advisories] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [Red Hat security advisories and VEX]