Uncaught Exception in vm2 - #VU146044
Published: August 28, 2026
Vulnerability identifier: #VU146044
CSH Severity: High
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: N/A
CWE-ID: CWE-248
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to uncaught exception handling in the vm2 promise bridge when calling a host function that returns a rejected host promise and ignoring the returned value. A remote attacker can execute sandboxed code that invokes a host promise-returning API without attaching a rejection handler to cause a denial of service.
Exploitation requires the ability to run code in a vm2 sandbox and an exposed host promise-returning API, or a NodeVM configuration that permits the events builtin.
Affected software
vm2
Remediation
Install security update from vendor's website.
vm2 - update to 3.11.8