CVE-2021-23449
Sandbox Bypass
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.
Attack profile
How easy it is to exploit
- Attack vector
- Network
- Complexity
- Low
- Privileges needed
- None
- User interaction
- None
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
Sandbox Bypass
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.
- Record
CVE-2021-23449- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P - Updated
- 2026-11-02
EUVDEUVD-2021-2254
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.
- Record
EUVD-2021-2254- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:P - Updated
- 2026-11-03
GitHub AdvisoriesGHSA-rjf2-j2r6-q8gr
Prototype Pollution in vm2
This affects the package vm2 before 3.9.4. Prototype Pollution attack vector can lead to sandbox escape and execution of arbitrary code on the host machine.
- Record
GHSA-rjf2-j2r6-q8gr- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-915, CWE-1321
- Updated
- 2026-11-02
NVD
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.
- Record
CVE-2021-23449- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - CVSS 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-1321
- Updated
- 2026-11-02
OSV
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.
- Record
CVE-2021-23449- CVSS 3.1
- 10.0 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H - Updated
- 2026-11-02
OSVGHSA-rjf2-j2r6-q8gr
Prototype Pollution in vm2
This affects the package vm2 before 3.9.4. Prototype Pollution attack vector can lead to sandbox escape and execution of arbitrary code on the host machine.
- Record
GHSA-rjf2-j2r6-q8gr- CVSS 3.1
- 9.8 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - Weakness
- CWE-1321, CWE-915
- Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
vm2npm |
before 3.9.4 | 3.9.4 |
History
| Recorded | Changed | Sources |
|---|---|---|
| aliases, products, published | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2021-23449 is a critical vulnerability (CVSS 9.8) in Patriksimek Vm2, published October 18, 2021. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.59%, the 89th percentile. Fixed in vm2 3.9.4.
References
snyk.io/vuln/SNYK-JS-VM2-1585918
github.com/patriksimek/vm2/issues/363
security.netapp.com/advisory/ntap-20211029-0010
nvd.nist.gov/vuln/detail/CVE-2021-23449