CVE-2026-100721 vm2 - Authorization Bypass

vm2 before 3.12.2 contains an authorization bypass caused by improper external-module resolution in NodeVM, letting untrusted guest code execute arbitrary code in the host context, exploit requires custom external resolver with context 'host'.

CVSS base score 9.0 /10
Critical
CISA KEV
Not listed
Public exploit
Proof of concept available
Authentication
Not required
EPSS
0.40% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authorization Bypass
Impact
Remote Code Execution
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Published
27 September 2026
Updated
15 October 2026
Weakness
CWE-863

Vendor fix

Upgrade to version 3.12.2 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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