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CVE-2018-16491

28
FAUCET Score

CVE-2018-16491 is a critical prototype pollution vulnerability affecting dreamerslab node.extend versions prior to 1.1.7 and ~2.0.1. This flaw allows an unauthenticated attacker to inject arbitrary properties into Object.prototype, leading to potential remote code execution or denial of service. With a CVSS score of 9.8, it represents a severe risk due to its network-based attack vector and low complexity. While no active exploitation, public exploit code, or significant community discussion has been observed, organizations using affected versions should prioritize patching.

Impacted Technologies

VendorProductVersion(s)CPE
< 1.1.7CPE matchmatch criteria
cpe:2.3:a:dreamerslab:node.extend:*:*:*:*:*:node.js:*:*
>= 2.0.0, < 2.0.1CPE matchmatch criteria
cpe:2.3:a:dreamerslab:node.extend:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/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
3.0

Exploit Intelligence

EPSS Score
1.72%
Probability of exploitation in next 30 days
EPSS Percentile
75.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0172 is in the 63rd percentile among its peer group of 36,835 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)

npmpatch availablevia ghsa
Product: node.extendFixed in: 1.1.7
npmpatch availablevia ghsa
Product: node.extendFixed in: 2.0.1

Vendor Advisories (2)

npmGHSA-r96c-57pf-9jjmcritical

Prototype Pollution in node.extend

Feb 7, 2019
redhatCVE-2018-16491Moderate

nodejs-extend: Prototype pollution in Object.prototype

Nov 30, 2018

References

hackerone.com / reports/430831
ExploitIssue TrackingThird Party Advisory