TI-2026-34798 Aliases CVE-2026-47210 GHSA-6j2x-vhqr-qr7q

vm2 sandbox escape via JSPI-backed Promise `.finally()` species bypass

HIGH 82CWE-913Published 2026-06-12 · Updated 2026-06-13

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Impact type: —
Confidentiality · integrity · availability: High · High · High
Fix status: Partial Red Hat: 1 fixed, 1 without a fix

Attack profile from CVSS 3.1 · CNA. Fix status from CNA, GitHub and Red Hat.

Summary

vm2 is an open source vm/sandbox for Node.js. Prior to version 3.11.4, a sandbox escape vulnerability in vm2 allows arbitrary code execution in the host process when untrusted code is executed with async support on runtimes exposing WebAssembly JSPI (WebAssembly.promising / WebAssembly.Suspending). In the tested configuration, a JSPI-backed Promise can reach Promise.prototype.finally() in a way that bypasses the expected Promise-species hardening and exposes a host-originated rejection object to attacker-controlled species logic, breaking the sandbox boundary. This issue has been patched in version 3.11.4.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV

EPSS 0.01716 77th percentileScored 2026-11-07

Fix Partial vm2 (patriksimek): 3.11.4vm2 (npm): 3.11.4Red Hat: 1 advisoryRed Hat: 1 fixed, 1 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: Poc
Automatable: Yes
Technical impact: Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
patriksimek	vm2	before 3.11.4	3.11.4	Patch available	CNA
—	vm2 (npm)	before 3.11.4	3.11.4	Patch available	GHSA-6j2x-vhqr-qr7q

vm2 Vendorpatriksimek Affected before 3.11.4 Fixed in 3.11.4 Patch available CNA
vm2 (npm) Vendor— Affected before 3.11.4 Fixed in 3.11.4 Patch available GHSA-6j2x-vhqr-qr7q

CPE names Threatist (inferred) · 1

Inferred from how NVD named this product before; not given by a source.

CPE	Versions	Role	Vendor
cpe:2.3:a:vm2_project:vm2::::::::	—	—	patriksimek

cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:*:*:* Versions — — ·patriksimek

Remediation

Fix · CNA vm2 (patriksimek) Fixed in 3.11.4
Fix · GHSA-6j2x-vhqr-qr7q vm2 (npm) Fixed in 3.11.4 Advisory →

Red Hat 1 advisory

RHSA-2026:36754 Released 2026-07-08 · Red Hat rating Important
Red Hat Developer Hub 1.10.2 release.
- Red Hat Developer Hub 1.10 registry.redhat.io/rhdh/rhdh-hub-rhel9, registry.redhat.io/rhdh/rhdh-rhel9-operator

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

Product	Status	Plan or fix
Self-service automation portal 2	Affected	—
Red Hat Developer Hub 1.10	Fixed	RHSA-2026:36754

Not affected: 1 product

Red Hat Developer Hub 1.10

Timeline

2026-10-02 Threatist record created from CVE-2026-47210
2026-10-03 Alias added: GHSA-6j2x-vhqr-qr7q

References

Advisory 1

https://nvd.nist.gov/vuln/detail/CVE-2026-47210

Other 4

TI-2023-14382 Sandbox Escape in vm2 CVSS 3.1CRITICAL 10.0
TI-2023-13478 vm2 Sandbox Escape vulnerability CVSS 3.1CRITICAL 10.0
TI-2026-63070 vm2 before 3.12.1 Sandbox Escape via Promise Symbol.species CVSS 4.0CRITICAL 10.0
TI-2026-63067 vm2 before 3.12.1 Sandbox Escape RCE via Non-Strict Host Function CVSS 4.0CRITICAL 10.0
TI-2026-62623 vm2 before 3.11.6 Process-wide State Exposure via os and dns CVSS 4.0CRITICAL 10.0
TI-2026-62618 vm2 before 3.11.8 Sandbox Escape via NodeVM CVSS 4.0CRITICAL 10.0

See all 80 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences