CVE-2026-47683
vm2 sandbox buffer allocation bypass allows attacker to exhaust host memory.
Is CVE-2026-47683 being exploited?
Not confirmed. CVE-2026-47683 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 0.39% probability of exploitation in the next 30 days.
How severe is CVE-2026-47683?
CVE-2026-47683 is rated High with a CVSS score of 8.7. 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-2026-47683?
Yes. A fix has been recorded for CVE-2026-47683. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-47683 affect?
CVE-2026-47683 affects vm2 < 3.11.6, Node.js applications using vm2, Sandboxed execution services. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-47683?
Upgrade vm2 to >=3.11.6; validate/restrict untrusted inputs and enforce memory limits.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Attacker-controlled Buffer.concat/from can trigger large synchronous host allocations from sandboxed code, causing process memory exhaustion and denial of service.
Patch when possible
- 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.