by Kastro
Paper/Archive/CVE-2026-47698

CVE-2026-47698

patriksimek vm2 — vm2: Sandbox Breakout Using Dangerous Host Proto Mutators

EPSS 1.0%public exploitCVSS 9.8
critical.is priorityof 100
52
CVSS 9.8 (CNA)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 61.9.619 × 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 3.11.6, 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.

Affected

ProductAffectedFixed inSource
vm2< 3.11.6–CNA

Scores by source

GitHub_M (CNA)9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: total

References

exploitgithub.com/patriksimek/vm2/security/advisories/GHSA-cfcw-xp6x-25gjrefgithub.com/patriksimek/vm2/commit/a85acb61f81402c6eabf32760aa11272af6d0f9erefgithub.com/patriksimek/vm2/releases/tag/3.11.6