Sandbox Bypass
Priority MEDIUM 49CWE-1321Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Impact type
- Tampering
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- Fixed
Attack profile from CVSS 3.1 · NVD. Fix status from CNA and GitHub. Impact type from CWE-915.
Summary
This affects the package vm2 before 3.9.4 via a Prototype Pollution attack vector, which can lead to execution of arbitrary code on the host machine.
Why it matters now
EPSS 0.0359 89th percentileScored 2026-11-07
Fix Fixed vm2: 3.9.4vm2 (npm): 3.9.4
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | vm2 | before 3.9.4 | 3.9.4 | Patch available | CNA |
| — | vm2 (npm) | before 3.9.4 | 3.9.4 | Patch available | GHSA-rjf2-j2r6-q8gr |
- vm2 Vendor— Affected before 3.9.4 Fixed in 3.9.4 Patch available CNA
- vm2 (npm) Vendor— Affected before 3.9.4 Fixed in 3.9.4 Patch available GHSA-rjf2-j2r6-q8gr
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:node.js:*:* | before 3.9.4 | Vulnerable | patriksimek |
- cpe:2.3:a:vm2_project:vm2:*:*:*:*:*:node.js:*:* Versions before 3.9.4 Vulnerable ·patriksimek
Remediation
- Fix · CNA vm2 Fixed in 3.9.4
- Fix · GHSA-rjf2-j2r6-q8gr vm2 (npm) Fixed in 3.9.4 Advisory →
Timeline
- 2026-10-02 Threatist record created from CVE-2021-23449
- 2026-10-03 Alias added: GHSA-rjf2-j2r6-q8gr
References
Advisory 4
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-2021-23449 · CVE Program
- CVE-2021-23449 · NVD
- FIRST EPSS
- GHSA-rjf2-j2r6-q8gr · GitHub Advisory Database · CC BY 4.0
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