Critical severity · published Aug 17, 2026
CVE-2026-47698
vm2: Sandbox Breakout Using Dangerous Host Proto Mutators
9.8
CVSS
1%
EPSS
No
On KEV
Description
vm2 is an open source vm/sandbox for Node.js. Prior to 3.11.6, lib/bridge.js and lib/setup-sandbox.js fail to block stacked indirection through Function.prototype.call around dangerous host prototype getter and setter mutators, allowing sandbox code to sever a host intrinsic's prototype chain and reach e.constructor.constructor for arbitrary host command execution. This issue is fixed in version 3.11.6.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
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
< 3.11.6 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-47698
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-47698
github.com
https://github.com/patriksimek/vm2/commit/a85acb61f81402c6eabf32760aa11272af6d0f9e
github.com
https://github.com/patriksimek/vm2/releases/tag/3.11.6
github.com
https://github.com/patriksimek/vm2/security/advisories/GHSA-cfcw-xp6x-25gj
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