Critical severity · published May 13, 2026
CVE-2026-43997
vm2: Sandbox Escape
10.0
CVSS
1%
EPSS
No
On KEV
Description
vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.0, it is possible to obtain the host Object. There are various ways to use the host Object, to escape the sandbox, one example would be using HostObject.getOwnPropertySymbols to obtain Symbol(nodejs.util.inspect.custom). This vulnerability is fixed in 3.11.0.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 62% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VM
vm2 · patriksimek
< 3.11.0 · source: vendor, NVD
RH
Red Hat Ansible Automation Platform 2.1 · Red Hat
All versions, or not specified · source: CISA
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-43997
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-43997
Exploit
https://github.com/patriksimek/vm2/security/advisories/GHSA-47x8-96vw-5wg6
access.redhat.com
https://access.redhat.com/errata/RHSA-2026:50850
access.redhat.com
https://access.redhat.com/security/cve/CVE-2026-43997
bugzilla.redhat.com
https://bugzilla.redhat.com/show_bug.cgi?id=2477203
security.access.redhat.com
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43997.json
More from vm2
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10.0
CVE-2026-93605
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10.0
CVE-2026-93603
vm2 before 3.12.1 Sandbox Escape RCE via Non-Strict Host Function
10.0
CVE-2026-92960
vm2 before 3.11.6 Process-wide State Exposure via os and dns
10.0
CVE-2026-92956
vm2 3.10.1 through 3.11.6 Sandbox Escape via WebAssembly.compileStreaming