CVE-2026-47698

vm2: Sandbox Breakout Using Dangerous Host Proto Mutators

At a glance

Severity: CRITICAL 9.8
EPSS: EPSS 0.97 % · percentile 62 (2026-10-27)
State: PUBLISHED
Published: 2026-08-17
Updated: 2026-08-19
Assigner: GitHub_M
NVD status: Deferred

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	GitHub_M
CVSS 3.1	CRITICAL 9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	NVD · security-advisories@github.com (Secondary)

Weaknesses (CWE)

CWE-913

Advisories

GHSA-cfcw-xp6x-25gj — vm2: Sandbox Breakout Using Dangerous Host Proto Mutators

European references

ENISA EUVD · EUVD-2026-60459
GCVE · GCVE-0-2026-47698

Affected products

Product	Versions
patriksimek · vm2	affected < 3.11.6

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD