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CVE-2018-3720

26
FAUCET Score

CVE-2018-3720 describes a prototype pollution vulnerability in the assign-deep node module prior to version 0.4.7. This allows an authenticated attacker to modify the Object prototype via __proto__, leading to the addition or alteration of properties across all objects. With a CVSS score of 8.8 (High), this vulnerability has a low attack complexity and can result in high impact to confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 0.4.7CPE matchmatch criteria
cpe:2.3:a:assign-deep_project:assign-deep:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.02%
Probability of exploitation in next 30 days
EPSS Percentile
78.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0202 is in the 77th percentile among its peer group of 17,823 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 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: assign-deepFixed in: 0.4.7

Vendor Advisories (1)

npmGHSA-xcvv-84j5-jw9hhigh

Prototype Pollution in assign-deep

Jul 26, 2018

References

github.com / jonschlinkert/assign-deep/commit/19953a8c089b0328c470acaaaf6accdfcb34da11
PatchThird Party Advisory
hackerone.com / reports/310707
ExploitThird Party Advisory