Vulnerability Description
vm2 before 3.12.2 does not apply host-side Promise rejection handling in the sandbox-to-host construct trap. In BaseHandler, the apply trap calls markHostPromiseHandled() on the returned value, but the adjacent construct path returns the result of Reflect.construct without the same sanitization. If an embedder exposes a constructable host function whose constructor returns a native rejected Promise, an untrusted script executed via VM.run can invoke it with `new` and ignore the result; the rejected host Promise crosses the bridge unhandled and, under Node's strict unhandled-rejection policy, is promoted to an uncaught exception that terminates the host process.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/patriksimek/vm2/security/advisories/GHSA-2v2p-6j97-cjg9
- https://www.vulncheck.com/advisories/vm2-before-3.12.2-host-process-termination-
- https://github.com/patriksimek/vm2/security/advisories/GHSA-2v2p-6j97-cjg9
FAQ
What is CVE-2026-100722?
CVE-2026-100722 is a vulnerability with a CVSS score of 6.8 (MEDIUM). vm2 before 3.12.2 does not apply host-side Promise rejection handling in the sandbox-to-host construct trap. In BaseHandler, the apply trap calls markHostPromiseHandled() on the returned value, but th...
How severe is CVE-2026-100722?
CVE-2026-100722 has been rated MEDIUM with a CVSS base score of 6.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-100722?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.