vm2: WASM Sandbox Escape (Node 25 only)
Priority HIGH 82CWE-693Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Security bypass, Code execution
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-693 and CWE-94.
Summary
vm2 is an open source vm/sandbox for Node.js. In version 3.10.4, vm2 is vulnerable to full sandbox escape with arbitrary code execution. Attacker code inside VM.run() obtains host process object and runs host commands with zero host cooperation. This issue has been patched in version 3.10.5.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.01086 65th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed vm2 (npm): 3.10.5
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 | = 3.10.4 | — | No fix listed | CNA |
| — | vm2 (npm) | before 3.10.5 | 3.10.5 | Patch available | GHSA-ffh4-j6h5-pg66 |
- vm2 Vendorpatriksimek Affected = 3.10.4 Fixed in — No fix listed CNA
- vm2 (npm) Vendor— Affected before 3.10.5 Fixed in 3.10.5 Patch available GHSA-ffh4-j6h5-pg66
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:node.js:*:* | before 3.10.5 | Vulnerable | patriksimek |
- cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:node.js:*:* Versions before 3.10.5 Vulnerable ·patriksimek
Remediation
- Fix · GHSA-ffh4-j6h5-pg66 vm2 (npm) Fixed in 3.10.5 Advisory →
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
Not affected: 2 products
- Red Hat Developer Hub 1
- Self-service automation portal 2
Timeline
- 2026-10-02 Threatist record created from CVE-2026-26956
- 2026-10-03 Alias added: GHSA-ffh4-j6h5-pg66
- 2026-10-27 Affected versions changed · Red Hat
References
More patriksimek Vm2 vulnerabilities
- 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-2026-33200 vm2: Sandbox Breakout Using Async Generator CVSS 3.1CRITICAL 9.8
- TI-2026-32052 vm2: Sandbox Breakout Through Null Proto Exception CVSS 3.1CRITICAL 9.8
- TI-2026-32051 vm2 has sandbox breakout via `neutralizeArraySpeciesBatch` CVSS 3.1CRITICAL 9.8
- TI-2026-32049 vm2: Sandbox Escape CVSS 3.1CRITICAL 10.0
Sources
- CVE-2026-26956 · CVE Program
- CVE-2026-26956 · NVD
- FIRST EPSS
- GHSA-ffh4-j6h5-pg66 · GitHub Advisory Database · CC BY 4.0
- CVE-2026-26956 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences