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CVE-2020-28270

30
FAUCET Score

CVE-2020-28270 is a critical prototype pollution vulnerability affecting 'object-hierarchy-access' versions 0.2.0 through 0.32.0, which could lead to denial of service and potentially remote code execution. With a CVSS score of 9.8, this vulnerability is easily exploitable over the network with low attack complexity and no user interaction, allowing for full impact on confidentiality, integrity, and availability. Despite its severity, there is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
>= 0.2.0, <= 0.32.0CPE matchmatch criteria
cpe:2.3:a:mjpclab:object-hierarchy-access:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
3.69%
Probability of exploitation in next 30 days
EPSS Percentile
88.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0369 is in the 81st percentile among its peer group of 36,862 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: object-hierarchy-accessFixed in: 0.33.0

Vendor Advisories (1)

npmGHSA-fxwf-45c7-4pprcritical

Prototype pollution in object-hierarchy-access

Oct 12, 2021

References

github.com / mjpclab/object-hierarchy-access/commit/7b1aa134a8bc4a376296bcfac5c3463aef2b7572
PatchThird Party Advisory
whitesourcesoftware.com / vulnerability-database/CVE-2020-28270
ExploitThird Party Advisory