by Kastro
Paper/Archive/CVE-2026-43997

CVE-2026-43997

patriksimek vm2 — vm2: Sandbox Escape

EPSS 1.0%public exploitCVSS 10.0
critical.is priorityof 100
52
CVSS 10.0 (CNA)10.0 / 10 × 3030.0Not in CISA KEV+300.0EPSS percentile 62.1.621 × 2012.4Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
vm2< 3.11.0–CNA
Red Hat Ansible Automation Platform 2.1see advisory1785854226redhat-SADP
Red Hat Developer Hubsee advisory–redhat-SADP

Scores by source

GitHub_M (CNA)10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
redhat-SADP (CNA)10.0CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgithub.com/patriksimek/vm2/security/advisories/GHSA-47x8-96vw-5wg6refaccess.redhat.com/security/cve/CVE-2026-43997refbugzilla.redhat.com/show_bug.cgi?id=2477203refsecurity.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-43997.jsonadvisoryaccess.redhat.com/errata/RHSA-2026:50850