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CVE-2026-47139

CVE-2026-47139 · vm2: NodeVM network builtin exclusions bypass via internal _http_client and _http_server

This page contains facts from public vulnerability sources. Check the original advisory before updating.

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.

CVSS 8.6 · High · EPSS 0.3% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • vm2

    Versions
    • < 3.11.4: Affected

    No fix published

  • vm2 npm

    Affected ranges
    • SEMVER: < 3.11.4

    Update to 3.11.4

Original sources

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