by Kastro
Paper/Archive/CVE-2026-47131

CVE-2026-47131

patriksimek vm2 — vm2: Sandbox Escape

EPSS 0.8%public exploitCVSS 10.0
critical.is priorityof 100
51
CVSS 10.0 (CNA)10.0 / 10 × 3030.0Not in CISA KEV+300.0EPSS percentile 55.2.552 × 2011.0Exploit: 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 version 3.11.4, by combining Buffer.call.call({}.__lookupGetter__, Buffer, "__proto__"), Buffer.call.call({}.__lookupSetter__, Buffer, "__proto__"), and Node.js's ERR_INVALID_ARG_TYPE Error, the host's TypeError constructor can be obtained, which allows the escape from the sandbox. This allows attackers to run arbitrary code. This issue has been patched in version 3.11.4.

Affected

ProductAffectedFixed inSource
vm2< 3.11.4–CNA

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
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgithub.com/patriksimek/vm2/security/advisories/GHSA-v6mx-mf47-r5wgrefgithub.com/patriksimek/vm2/commit/27c525f4615e2b983f122e2bed327d810126f5c8refgithub.com/patriksimek/vm2/releases/tag/v3.11.4