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No exploitation reportedFix available

CVE-2020-7746

No exploitation reported by the sources we read.

  • Published2020-10-29
  • Fixed in2.9.4
  • WeaknessCWE-1321

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

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.

Timeline

dates in UTC
  1. 2020-10-2908:15CVE publishedNVD

Versions per branch

NVD · OSV
Chartjs chart.js
BranchAffectedFixed in
2.9< 2.9.42.9.4

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

  • node-chart.jsUbuntu:20.04:LTSall versions · no fixed version listed
  • node-chart.jsDebian:14all versions · fixed in 2.9.4+dfsg+~cs2.10.1-1
  • node-chart.jsDebian:13all versions · fixed in 2.9.4+dfsg+~cs2.10.1-1
  • node-chart.jsDebian:12all versions · fixed in 2.9.4+dfsg+~cs2.10.1-1

Vendor advisories

  • CVE-2020-7746 Red Hat Product Security1 product fixed

    chart.js: prototype pollution

  • RHSA-2022:6813 Red Hat Product Security1 product fixed

    Red Hat Security Advisory: Red Hat Process Automation Manager 7.13.1 security update

Full record on NVD

Fix

  1. Update Chartjs chart.js to 2.9.4
  2. Vendor fix Red Hat Product Security RHSA-2022:6813 · 1 productFor on-premise installations, before applying the update, back up your existing installation, including all applications, configuration files, databases and database settings, and so on. Red Hat recommends that you halt the server by stopping the JBoss Application Server process before installing …

Advisories and patches

Detection

Nuclei template
none so far
ProjectDiscovery
Exploit-DB
no entry
Exploit-DB
Proof of concept
Metasploit modules
none listed
Metasploit Framework

Sources

  • CNACVSS 3.17.5known since 2026-10-23
  • NVDCVSS 3.19.8read 2026-10-23
  • NVDCVSS 2.05read 2026-10-23
  • NVDweakness (CWE)CWE-1321read 2026-10-23
  • FIRST EPSSEPSS score4.7 %2026-11-08
  • OSVaffected packages—
  • GitHub AdvisoriesadvisoryHIGH2021-04-20

Identifiers

Technical details

CVSS v3 Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published
2020-10-29
Last Modified
2026-06-17
NVD status
Modified
GitHub Advisory
GHSA-h68q-55jf-x68w

Frequently asked questions

What is CVE-2020-7746?

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.

Is CVE-2020-7746 actively exploited?

Active exploitation of CVE-2020-7746 has not been confirmed. Its EPSS score was 4.7% on 2026-11-08, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-7746?

CVE-2020-7746 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

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