Vulnerabilities in pkg:npm/unflatten

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Advisory Summary

GHSA-6fh5-8wq8-w3wr is a HIGH prototype pollution vulnerability (CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')) affecting Unflatten libraries in the npm ecosystem. The issue involves prototype pollution in unflatten. Remediation is available in the latest vendor maintenance releases.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/unflatten

1 Known Advisory Record(s)

Vulnerability advisories affecting package pkg:npm/unflatten. Select an advisory below to view technical details or fixes.

Advisory ID CVE / NVD Severity Summary
GHSA-6fh5-8wq8-w3wr - HIGH Prototype Pollution in unflatten

GHSA-6fh5-8wq8-w3wr at a Glance

CVE Identifier N/A
GHSA Identifier GHSA-6fh5-8wq8-w3wr
Severity HIGH
CVSS v3.1 Base Score N/A
CWE Classification CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Affected Product Unflatten
Package Ecosystem npm
Published Date
Last Updated

How to Fix GHSA-6fh5-8wq8-w3wr

To remediate this vulnerability, upgrade all affected Unflatten dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

unflatten fixed: Latest secure release 
npm install unflatten@Latest secure release
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls unflatten

How to Check if You Are Affected

To determine whether your Node.js application is affected by GHSA-6fh5-8wq8-w3wr, inspect your project dependencies using npm:

npm ls unflatten

Analyze the terminal output to locate any version of Unflatten in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The npm ls unflatten command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution'), where the product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype. In Unflatten, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

All versions of `unflatten` are vulnerable to prototype pollution. The function `unflatten` does not restrict the modification of an Object's prototype, which may allow an attacker to add or modify an existing property that will exist on all objects. ## Recommendation No fix is currently available. Consider using an alternative package until a fix is made available.

GHSA-6fh5-8wq8-w3wr Affected Unflatten Versions

1 component(s)
Product / Package Ecosystem Affected Versions Fixed Version
unflatten
npm/unflatten
npm
≥ 0.0.0

References

www.npmjs.com/advisories/1329 WEB
https://www.npmjs.com/advisories/1329

Frequently Asked Questions

What is GHSA-6fh5-8wq8-w3wr?
GHSA-6fh5-8wq8-w3wr is a security vulnerability in Unflatten involving Prototype Pollution in unflatten under CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution').
Which Unflatten versions are affected?
Affected versions include releases prior to current release patches across affected packages: unflatten.
What version fixes GHSA-6fh5-8wq8-w3wr?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
Is unflatten affected?
Yes, unflatten is affected in releases prior to Latest secure release. Upgrade your dependency to Latest secure release or later.
What CWE is associated with GHSA-6fh5-8wq8-w3wr?
GHSA-6fh5-8wq8-w3wr is classified under CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') (The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.).
How can I check npm dependencies for GHSA-6fh5-8wq8-w3wr?
Run the dependency tree command: 'npm ls unflatten'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-6fh5-8wq8-w3wr",
  "modified" : "2020-08-31T18:55:18Z",
  "published" : "2020-09-04T15:09:55Z",
  "aliases" : [ ],
  "summary" : "Prototype Pollution in unflatten",
  "details" : "All versions of `unflatten` are vulnerable to prototype pollution. The function `unflatten` does not restrict the modification of an Object's prototype, which may allow an attacker to add or modify an existing property that will exist on all objects.\n\n\n\n\n## Recommendation\n\nNo fix is currently available. Consider using an alternative package until a fix is made available.",
  "severity" : [ ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "unflatten"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0.0.0"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://www.npmjs.com/advisories/1329"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1321" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2020-08-31T18:55:18Z",
    "nvd_published_at" : null
  }
}