CVE-2026-43997criticalCWE-653 CWE-94

vm2: Sandbox Escape

28Vexday Risk Score

No sign of exploitation. No public exploitation artifact known so far.

ssvc Trackcvss 10epss 1.0%

exploitation probability

1.0%top 41% of all CVEs

observed exploitation

nono source reports it

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:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

patriksimek · vm2

References

https://access.redhat.com/errata/RHSA-2026:50850 https://access.redhat.com/security/cve/CVE-2026-43997 https://bugzilla.redhat.com/show_bug.cgi?id=2477203 https://github.com/patriksimek/vm2/security/advisories/GHSA-47x8-96vw-5wg6 https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43997.json