CVE-2020-28270
Prototype pollution in object-hierarchy-access
Prototype pollution vulnerability in 'object-hierarchy-access' versions 0.2.0 through 0.32.0 allows attacker to cause a denial of service and may lead to remote code execution.
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
NVD Score used
Prototype pollution vulnerability in 'object-hierarchy-access' versions 0.2.0 through 0.32.0 allows attacker to cause a denial of service and may lead to remote code execution.
- Record
CVE-2020-28270- 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 2.0
- 7.5 High
AV:N/AC:L/Au:N/C:P/I:P/A:P - Weakness
- CWE-1321
- Updated
- 2026-11-02
CVE List No score
Prototype pollution vulnerability in 'object-hierarchy-access' versions 0.2.0 through 0.32.0 allows attacker to cause a denial of service and may lead to remote code execution.
- Record
CVE-2020-28270- Updated
- 2026-11-02
EUVDEUVD-2021-2201 No score
Prototype pollution vulnerability in 'object-hierarchy-access' versions 0.2.0 through 0.32.0 allows attacker to cause a denial of service and may lead to remote code execution.
- Record
EUVD-2021-2201- Updated
- 2026-11-03
GitHub AdvisoriesGHSA-fxwf-45c7-4ppr
Prototype pollution in object-hierarchy-access
Overview:Prototype pollution vulnerability in ‘object-hierarchy-access’ versions 0.2.0 through 0.32.0 allows attacker to cause a denial of service and may lead to remote code execution.
- Record
GHSA-fxwf-45c7-4ppr- 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
OSV
Prototype pollution vulnerability in 'object-hierarchy-access' versions 0.2.0 through 0.32.0 allows attacker to cause a denial of service and may lead to remote code execution.
- Record
CVE-2020-28270- 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 - Updated
- 2026-11-02
OSVGHSA-fxwf-45c7-4ppr
Prototype pollution in object-hierarchy-access
Overview:Prototype pollution vulnerability in ‘object-hierarchy-access’ versions 0.2.0 through 0.32.0 allows attacker to cause a denial of service and may lead to remote code execution.
- Record
GHSA-fxwf-45c7-4ppr- 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 |
|---|---|---|
object-hierarchy-accessnpm |
0.2.0 up to 0.33.0 | 0.33.0 |
History
| Recorded | Changed | Sources |
|---|---|---|
| facts | ||
| aliases | EUVD | |
| first indexed | CVE List, GitHub Advisories, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2020-28270 is a critical vulnerability (CVSS 9.8) in Mjpclab Object-hierarchy-access, published November 12, 2020. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 3.85%, the 90th percentile. Fixed in object-hierarchy-access 0.33.0.
References
github.com/mjpclab/object-hierarchy-access/commit/7b1aa134a8bc4a376296bcfac5c3463aef2b7572
whitesourcesoftware.com/vulnerability-database/CVE-2020-28270
nvd.nist.gov/vuln/detail/CVE-2020-28270