Improper Check or Handling of Exceptional Conditions in vm2 - #VU129599
Published: May 4, 2026
Vulnerability identifier: #VU129599
CSH Severity: High
CVSS v4.0: 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/E:U/U:Amber
CVE-ID: N/A
CWE-ID: CWE-703
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Patrik Simek
Affected software:
vm2
vm2
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary commands on the host system.
The vulnerability exists due to improper exception handling in handleException when processing exceptions with a null prototype. A remote attacker can throw and catch a crafted sandbox object with a null prototype to execute arbitrary commands on the host system.
Exploitation requires the ability to execute arbitrary code inside the context of a vm2 sandbox.
Remediation
Install security update from vendor's website.