Vulnerability · Published Jun 12, 2026 · Assigned by GitHub_M

CVE-2026-47140vm2: NodeVM builtin denylist bypass via process and inspector/promises allows host code execution

Critical 10.0

In plain English

A critical-severity security flaw in vm2 from patriksimek. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 62% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)10.0Critical

Exploit odds (30 days)1.0%top 37.7% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	vm2	3.11.4	GHSA-rp36-8xq3-r6c4

Affected products (as reported)

Vendor	Product	Versions
patriksimek	vm2	< 3.11.4

Weakness: CWE-693 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

References

https://github.com/patriksimek/vm2/security/advisories/GHSA-rp36-8xq3-r6c4 x_refsource_CONFIRM
https://github.com/patriksimek/vm2/commit/a1ed47a98d1cc36cb48c0d566d55889688e0b59b x_refsource_MISC
https://github.com/patriksimek/vm2/releases/tag/v3.11.4 x_refsource_MISC