CVE-2026-92958: vm2 through 3.11.6 contains a builtin-module denylist bypass in NodeVM. When the embedder uses the builtin wildcard together with negative entries (e.g…

PriorityP350high8.5CVSS 3.1

AVNACLPRLUINSCCNIHAL

EPSS

0.28%

20.5th percentile

vm2 through 3.11.6 contains a builtin-module denylist bypass in NodeVM. When the embedder uses the builtin wildcard together with negative entries (e.g. require: { builtin: ['*', '-fs', '-child_process'] }), negative entries are matched by exact module name in lib/builtin.js, so -fs removes only the builtin named fs and does not remove builtin subpaths such as fs/promises. Sandboxed code can therefore call require('fs/promises') or require('node:fs/promises') and reach the promise-based filesystem API despite fs being denied; node: prefix handling is likewise inconsistent (a -node:fs/promises entry does not block require('fs/promises')). Host file creation and writing were confirmed via fsp.writeFile(), and other fs/promises operations (cp, mkdir, rename, rm, rmdir, truncate, read operations, etc.) are also reachable. This issue is fixed in vm2 3.11.7.

Affected

6 ranges

Vendor	Product	Version range	Fixed in
ansible-automation-platform	automation-portal	—	—
ansible-automation-platform	bootc-automation-portal-rhel9	—	—
patriksimek	vm2	< 3.11.7	3.11.7
rhdh	red-hat-developer-hub-backstage-plugin-lightspeed-backend	—	—
rhdh	red-hat-developer-hub-backstage-plugin-orchestrator-backend	—	—
rhdh	rhdh-hub-rhel9	—	—

CVSS provenance

nvdv3.18.5HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:L

nvdv4.08.4HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:L/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

vendor_redhat8.5HIGH

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