Protection mechanism failure in vm2 - CVE-2026-93606
Published: September 4, 2026 / Updated: September 22, 2026
Vulnerability identifier: #VU146900
CSH Severity: High
CVSS v4: 9.3 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-93606
CWE-ID: CWE-693
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to protection mechanism failure in the vm2 bridge's host-realm Promise rejection sanitizer when handling a host-realm Promise rejection without an onRejected handler. A remote attacker can hijack Symbol.species on the host Promise and invoke then without an onRejected handler to execute arbitrary code.
Exploitation requires the embedder to expose a host-realm Promise that rejects with a host-pivotable value.
Affected software
vm2
How to mitigate CVE-2026-93606
Install security update from vendor's website.
vm2 - update to 3.12.1