CVE-2026-100722

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 v3 6.8 MEDIUM

6.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.2 / Impact : 4.0

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://github.com/patriksimek/vm2/security/advisories/GHSA-2v2p-6j97-cjg9
https://www.vulncheck.com/advisories/vm2-before-3.12.2-host-process-termination-via-construct-trap
https://github.com/patriksimek/vm2/security/advisories/GHSA-2v2p-6j97-cjg9

Configurations

No configuration.

History

28 Sep 2026, 14:17

Type	Values Removed	Values Added
References	~~() https://github.com/patriksimek/vm2/security/advisories/GHSA-2v2p-6j97-cjg9 -~~	() https://github.com/patriksimek/vm2/security/advisories/GHSA-2v2p-6j97-cjg9 -

27 Sep 2026, 02:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-27 02:17

Updated : 2026-09-28 14:17

NVD link : CVE-2026-100722

Mitre link : CVE-2026-100722

CVE.ORG link : CVE-2026-100722

JSON object : View

Products Affected

No product.

CWE

CWE-248

Uncaught Exception

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