CVE-2026-92948 patriksimek CVE debrief

Who should care

Node.js and vm2 users, particularly those using NodeVM sandboxes, should assess exposure and prioritize remediation. Operators, platform administrators, vulnerability management teams, and security teams may be impacted by this vulnerability and should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance.

Why it matters

CVE-2026-92948 is a critical vulnerability in vm2 that allows for sandbox escape and potential arbitrary JavaScript execution in Node.js environments. Node.js and vm2 users should assess exposure and prioritize remediation.

• Potential for arbitrary JavaScript execution in an unrestricted host Node process
• Risk of sandbox escape and elevated privileges
• Need for prompt remediation to prevent exploitation

Technical summary

vm2 versions >= 3.9.6 and <= 3.11.6 are affected by a NodeVM builtin allowlist bypass, permitting a sandbox escape on Node.js 24 and newer when the embedder explicitly allows the node:test builtin. The vulnerability allows for potential arbitrary JavaScript execution in an unrestricted host Node process outside the NodeVM sandbox. Fixed in vm2 3.11.7. Users should review and restrict use of the node:test builtin in NodeVM sandboxes to prevent exploitation. The vulnerability has a CVSS score of 9.4 and is considered critical.

Defensive priority

High priority for Node.js and vm2 users

Recommended defensive actions

• Update vm2 to version 3.11.7 or later
• Review and restrict use of node:test builtin in NodeVM sandboxes
• Monitor for suspicious activity in Node.js environments
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

Official CVE Program record and NIST NVD detail page provide vulnerability metadata. Vendor advisory and Vulncheck report detail the sandbox escape vulnerability. The CVE record was published on 2026-09-17T14:18:00.310Z and has not been modified since then. Evidence is limited to public sources and may not reflect the full scope or impact of the vulnerability. Defenders should verify affected scope and vendor guidance for accurate risk assessment.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.