Security readout for executives and security teams
Plain-English summary
CVE-2018-16491 affects the Node.js package node.extend. Vulnerable versions can let attacker-controlled data add properties to JavaScript’s global Object prototype, potentially changing application behavior. Business risk depends on whether the package is present and exposed to untrusted input.
Executive priority
Treat as a dependency hygiene issue with moderate urgency. Prioritize verification where Node.js services accept external input or support critical business workflows. No cited source indicates known active exploitation.
Technical view
The issue is prototype pollution in node.extend versions <1.1.7 and 2.x before 2.0.1, allowing arbitrary properties to be injected onto Object.prototype. The CVE record lists CWE-400 and provides no CVSS score in the supplied sources.
Likely exposure
Exposure is most likely in Node.js applications that directly or transitively depend on affected node.extend versions and process untrusted object data through it.
Exploitation context
The supplied sources do not show active exploitation, and the CVE is not listed as KEV. Practical impact depends on application logic and whether polluted prototype properties influence security decisions, data handling, or availability.
Researcher notes
Evidence is limited to the CVE record and HackerOne reference. The record identifies affected version ranges and prototype pollution impact, but does not provide CVSS, exploit maturity, or detailed remediation notes beyond implied fixed versions.
Mitigation direction
- Upgrade node.extend outside the affected ranges: 1.1.7 or later, or 2.0.1 or later.
- Review vendor and package maintainer guidance before release changes.
- Rebuild and redeploy applications after dependency updates.
- Prioritize internet-facing services and services processing untrusted JSON or object input.
Validation and detection
- Check package manifests and lockfiles for node.extend versions.
- Identify transitive dependencies that include node.extend.
- Confirm deployed artifacts match remediated dependency versions.
- Test application behavior after upgrade for regression risk.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
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CWE-400: Exact CWE lookup
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Open ATT&CK lookupCVE-2018-16491 mapping review
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Open ATT&CK lookup- Severity
- Unknown
- CVSS
- Not scored
- Known Exploited
- No
- Published
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CVSS and timeline data
No CVSS vectors or timeline events were available in the normalized CVE source material.
Source materials
- CVE List V5 sourceCVE List V5
- https://hackerone.com/reports/430831CVE reference · x_refsource_MISC
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Uncontrolled Resource Consumption
Uncontrolled Resource Consumption represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.