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Fencer Vulns
critical 10.0

CVE-2026-47140 json

vm2: NodeVM builtin denylist bypass via process and inspector/promises allows host code execution

published 2026-05-29 5 mo ago modified 2026-10-26 14 d ago also EUVD-2026-36446 , GHSA-rp36-8xq3-r6c4

cvss
10.0
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
1.0%
EPSS 1.0% chance of exploitation in 30 days, percentile 62%
public exploits
0
none known

Summary

vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, NodeVM blocks several dangerous Node.js builtins such as module, worker_threads, cluster, vm, repl, and inspector. However, the denylist misses process and inspector/promises. Both can be used from sandboxed code to reach host-side execution primitives. This allows sandboxed code to bypass the intended builtin restrictions and execute code in the host process. This issue has been patched in version 3.11.4.

Patch / fix

  • npm vm2 3.11.4
  • vm2_project vm2 3.11.4

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2026-47140 updated cvss 4.1

vm2: vm2: Arbitrary code execution due to incomplete sandbox restrictions

  • Red Hat Ansible Automation Platform 2.1 ansible-automation-platform/automation-portal 1785854226
    fixed: vendor fix RHSA-2026:50850
  • Red Hat Developer Hub 1.9 rhdh/rhdh-hub-rhel9 1782761244
    fixed: vendor fix RHSA-2026:33574
  • Red Hat Developer Hub 1.10 rhdh/rhdh-hub-rhel9 1783448184
    fixed: vendor fix RHSA-2026:36754
  • Red Hat Developer Hub 1.9 rhdh/rhdh-rhel9-operator 1782767215, rhdh/rhdh-operator-bundle 1782772967 Red Hat Developer Hub 1.10 rhdh/rhdh-rhel9-operator 1783447707, rhdh/rhdh-operator-bundle 1783453583, rhdh/rhdh-must-gather-rhel9 1783447888, rhdh/rhdh-rag-content-rhel9 1783446803
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
Proof of concept is public
Automatable
yes
Technical impact
total
Assessed
4 mo ago

Exploit prediction

0.98% chance of exploitation in the next 30 days, higher than 62% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • github.com https://github.com/patriksimek/vm2/security/advisories/GHSA-rp36-8xq3-r6c4 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
CNA 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
GitHub 3.1 10.0 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
npm vm2
<3.11.4
3.11.4

Affected products

  • patriksimek vm2

Classification

Weakness
  • CWE-693 Protection Mechanism Failure

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.