CVE-2023-37903
RCE in vm2 sandbox (Node.js) <=3.9.19 via sandbox escape; no patches.
Is CVE-2023-37903 being exploited?
Not confirmed. CVE-2023-37903 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 4.2% probability of exploitation in the next 30 days.
How severe is CVE-2023-37903?
CVE-2023-37903 is rated Critical with a CVSS score of 9.8. 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-2023-37903?
Yes. A fix has been recorded for CVE-2023-37903. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2023-37903 affect?
CVE-2023-37903 affects vm2 library (Node.js) <= 3.9.19. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2023-37903?
Replace vm2 with alternative; audit dependencies; remove vulnerable versions.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Sandbox escape enables remote code execution in apps using vm2; attacker can run arbitrary code.
Monitor only
- affected<= 3.9.19
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.