Protection Mechanism Failure in vm2 - #VU129586
Published: May 4, 2026
Vulnerability identifier: #VU129586
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: N/A
CWE-ID: CWE-693
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 disclose sensitive information.
The vulnerability exists due to a protection mechanism failure in the code transformer when processing sandboxed code that avoids the catch, import, and async keywords. A remote attacker can submit specially crafted code to disclose sensitive information.
The issue exposes the internal VM2_INTERNAL_STATE_DO_NOT_USE_OR_PROGRAM_WILL_FAIL object and bypasses the identifier check that is intended to block access to it.
Remediation
Install security update from vendor's website.