Vulnerabilities in pkg:npm/chart.js

PACKAGE
Advisory Identifier: GHSA-h68q-55jf-x68w
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Advisory Summary

CVE-2020-7746 is a HIGH (CVSS 7.5) prototype pollution vulnerability (CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')) affecting Chart.js libraries in the npm ecosystem. The issue involves prototype pollution in chart.js. Remediation is available by upgrading affected packages to version 2.9.4.

1 Known Advisory Record(s)
Package Vulnerability Intelligence

pkg:npm/chart.js

1 Known Advisory Record(s)

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

Advisory ID CVE / NVD Severity Summary
GHSA-h68q-55jf-x68w CVE-2020-7746 HIGH Prototype pollution in chart.js

CVE-2020-7746 at a Glance

CVE Identifier CVE-2020-7746
GHSA Identifier GHSA-h68q-55jf-x68w
Severity HIGH
CVSS v3.1 Base Score 7.5
CWE Classification CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Affected Product Chart.js
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 7.5

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality None (C:N)
Integrity None (I:N)
Availability High (A:H)

How to Fix CVE-2020-7746

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

chart.js fixed: 2.9.4 
npm install chart.js@2.9.4
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 chart.js

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2020-7746, inspect your project dependencies using npm:

npm ls chart.js

Analyze the terminal output to locate any version of Chart.js in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2.9.4), your application is affected.

Note: The npm ls chart.js 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 Chart.js, 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

This affects the package chart.js before 2.9.4. The options parameter is not properly sanitized when it is processed. When the options are processed, the existing options (or the defaults options) are deeply merged with provided options. However, during this operation, the keys of the object being set are not checked, leading to a prototype pollution.

CVE-2020-7746 Affected Chart.js Versions

1 component(s)
Fixed Versions:
2.9.4
Product / Package Ecosystem Affected Versions Fixed Version
chart.js
npm/chart.js
npm
< 2.9.4
2.9.4

References

NVD — CVE-2020-7746 NVD
https://nvd.nist.gov/vuln/detail/CVE-2020-7746
Chart.js Source Repository REPOSITORY
https://github.com/chartjs/Chart.js/pull/7920
snyk.io/vuln/snyk-java-orgw... WEB
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1019375
snyk.io/vuln/snyk-java-orgw... WEB
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBCHARTJS-1019376
snyk.io/vuln/snyk-java-orgw... WEB
https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1019374
snyk.io/vuln/snyk-js-chartj... WEB
https://snyk.io/vuln/SNYK-JS-CHARTJS-1018716

Frequently Asked Questions

What is CVE-2020-7746?
CVE-2020-7746 is a security vulnerability in Chart.js involving Prototype pollution in chart.js under CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution').
Which Chart.js versions are affected?
Affected versions include releases prior to 2.9.4 across affected packages: chart.js.
What version fixes CVE-2020-7746?
Upgrading to 2.9.4 (or the latest patched release for your respective branch) resolves the vulnerability.
Is chart.js affected?
Yes, chart.js is affected in releases prior to 2.9.4. Upgrade your dependency to 2.9.4 or later.
What is the CVSS score of CVE-2020-7746?
CVE-2020-7746 has a CVSS v3.1 base score of 7.5 (HIGH) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
What CWE is associated with CVE-2020-7746?
CVE-2020-7746 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 CVE-2020-7746?
Run the dependency tree command: 'npm ls chart.js'. 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-h68q-55jf-x68w",
  "modified" : "2021-04-20T17:46:27Z",
  "published" : "2021-05-10T18:47:53Z",
  "aliases" : [ "CVE-2020-7746" ],
  "summary" : "Prototype pollution in chart.js",
  "details" : "This affects the package chart.js before 2.9.4. The options parameter is not properly sanitized when it is processed. When the options are processed, the existing options (or the defaults options) are deeply merged with provided options. However, during this operation, the keys of the object being set are not checked, leading to a prototype pollution.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "chart.js"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.9.4"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2020-7746"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/chartjs/Chart.js/pull/7920"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWER-1019375"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSBOWERGITHUBCHARTJS-1019376"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1019374"
  }, {
    "type" : "WEB",
    "url" : "https://snyk.io/vuln/SNYK-JS-CHARTJS-1018716"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-1321", "CWE-915" ],
    "severity" : "HIGH",
    "github_reviewed" : true,
    "github_reviewed_at" : "2021-04-20T17:46:27Z",
    "nvd_published_at" : "2020-10-29T08:15:00Z"
  }
}