vm2 is widely used as a Node.js sandbox; this RCE sandbox-escape can let untrusted code execute host commands and compromise servers broadly.
CVE-2026-47686
vm2 sandbox escape allows remote code execution via unsanitized Error.cause
Is CVE-2026-47686 being exploited?
Not confirmed. CVE-2026-47686 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.38% probability of exploitation in the next 30 days.
How severe is CVE-2026-47686?
CVE-2026-47686 is rated Critical with a CVSS score of 9.9. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-47686?
Yes. A fix has been recorded for CVE-2026-47686. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-47686 affect?
CVE-2026-47686 affects vm2 < 3.11.6, Node.js applications using vm2, Services embedding vm2 sandbox. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-47686?
Upgrade vm2 to >=3.11.6; audit and restrict host-exposed functions
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote code execution: sandboxed code can obtain host objects (e.g., process) via Error.cause and execute arbitrary host commands.
Immediate action required
- affected< 3.11.6
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.