EUVD-2026-81610
GHSA-qj2x-7x9q-qgm7
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:H/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
Attacker controls sandbox code (PR:N under vm2's model); reads/writes host-process state gives S:C, C:H (identity+topology) and I:H (global DNS hijack); A:L for resolver disruption/setPriority.
Primary rating from Vendor (VulnCheck).
CVSS VectorVendor: VulnCheck
Lifecycle Timeline
5Blast Radius
ecosystem impact- 40 npm packages depend on vm2 (6 direct, 34 indirect)
Ecosystem-wide dependent count for version 3.11.6.
DescriptionCVE.org
vm2 before 3.11.6 fails to restrict access to os and dns builtins under the builtin: ['*'] configuration, allowing sandbox code to read host process identity and network topology. Attackers can invoke dns.setServers() to hijack the host process DNS resolver globally, redirecting all subsequent host DNS queries through an attacker-controlled resolver.
AnalysisAI
Sandboxed JavaScript executed inside vm2's NodeVM before 3.11.6 can step outside the isolation boundary to read host process identity and network topology and, worse, to hijack the host's DNS resolver process-wide. The exposure is gated by two conditions: the embedding application must run attacker-controlled code in NodeVM (the tool's core threat model) and must use the non-default wildcard whitelist builtin: ['*'], which fails to exclude the os and dns modules; the assessed vector is unauthenticated (CVSS PR:N), so once code reaches the sandbox no credentials or user interaction are needed, and a single dns.setServers() call persists for the life of the host process. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires the application to (1) run attacker-controlled JavaScript inside vm2's NodeVM - the tool's core threat model - and (2) be configured with the NON-default builtin: ['*'] setting, which exposes the os and dns builtins the fix should have blocked. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | This is a genuinely high-severity issue within its threat model, but its real-world priority is gated by a non-default configuration and vm2's inherent purpose. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to the vendor-released patch: vm2 3.11.6, which closes the os and dns gap alongside the earlier GHSA-9g8x-92q2-p28f builtin blocklist changes (see https://github.com/patriksimek/vm2/security/advisories/GHSA-m5w8-4gq2-6f8x). … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours, identify all applications embedding vm2 and check for the 'builtin: ['*']' configuration; immediately upgrade to vm2 3.11.6 where feasible, or if upgrade is blocked, disable the wildcard builtin and explicitly whitelist only necessary modules (excluding os and dns). …
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External POC / Exploit Code
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