CVE-2026-47139

HIGH 8.6

vm2: NodeVM network builtin exclusions bypass via internal _http_client and _http_server

CVSS Score

8.6

EPSS Score

0.1%

EPSS Percentile

17th

vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, NodeVM supports excluding public network builtins from the wildcard builtin option. With this configuration direct access to http, https, http2, net, dgram, tls, dns, and dns/promises is blocked. However, Node.js also exposes underscored internal HTTP builtins such as _http_client and _http_server. These are not blocked when the public modules are excluded. Sandboxed code can use these internal builtins to make outbound HTTP requests and open listening HTTP sockets even though the public network modules are denied. This issue has been patched in version 3.11.4.

CWE	CWE-693
Vendor	patriksimek
Product	vm2
Published	Jun 12, 2026

Stay Ahead of the Next One

Get instant alerts for patriksimek vm2

Be the first to know when new high vulnerabilities affecting patriksimek vm2 are published — delivered to Slack, Telegram or Discord.

Get Free Alerts → Free · No credit card · 60 sec setup

CVSS v3 Breakdown

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

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Changed

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

patriksimek / vm2

< 3.11.4

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/patriksimek/vm2/security/advisories/GHSA-r9pm-gxmw-wv6p github.com: https://github.com/patriksimek/vm2/commit/436053e30eecbabd487e2fd2959c137ac34e2bb1 github.com: https://github.com/patriksimek/vm2/releases/tag/v3.11.4