CVE-2026-47141
MEDIUMvm2: NodeVM observability builtins leak host process and HTTP request data
Title source: cnaDescription
vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, NodeVM exposes some process-wide observability builtins when they are allowed through require.builtin. The diagnostics_channel, async_hooks, and perf_hooks builtins are not blocked by the dangerous builtin denylist. These modules are process-wide, not sandbox-local. Sandboxed code can use them to observe host application data across the vm2 boundary. This issue has been patched in version 3.11.4.
References (3)
Core 3
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/patriksimek/vm2/security/advisories/GHSA-9g8x-92q2-p28f
X_Refsource_Misc x_refsource_misc
https://github.com/patriksimek/vm2/commit/e1c48fce05189f48e71efbd32af0754efa4066bb
X_Refsource_Misc x_refsource_misc
https://github.com/patriksimek/vm2/releases/tag/v3.11.4
Scores
CVSS v4
6.9
EPSS
0.0051
EPSS Percentile
39.1%
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-668
Status
published
Products (2)
npm/vm2
0 - 3.11.4npm
patriksimek/vm2
< 3.11.4
Published
Jun 12, 2026
Tracked Since
Jun 12, 2026