CVE-2026-47139
Description
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.
AI Insight
LLM-synthesized narrative grounded in this CVE's description and references.
Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
vm2npm | < 3.11.4 | 3.11.4 |
Affected products
2- Range: <= 3.11.3
Patches
Vulnerability mechanics
References
5- github.com/advisories/GHSA-r9pm-gxmw-wv6pghsaADVISORY
- nvd.nist.gov/vuln/detail/CVE-2026-47139ghsaADVISORY
- github.com/patriksimek/vm2/commit/436053e30eecbabd487e2fd2959c137ac34e2bb1nvdWEB
- github.com/patriksimek/vm2/releases/tag/v3.11.4nvdWEB
- github.com/patriksimek/vm2/security/advisories/GHSA-r9pm-gxmw-wv6pnvdWEB
News mentions
1- vm2: Nine Sandbox Escape CVEs Disclosed in a Single-Day AdvisoryVypr Intelligence · May 29, 2026