CVE-2020-7746: This affects the package chart.js before 2.9.4

This week

HIGH 7.5REMOTEUPGRADE

CVE-2020-7746 is a high-severity flaw (CVSS 7.5) affecting chart.js. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

High severity
EPSS top 8%: very likely to be exploited
Public exploit reference
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	7.5 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	4.7% (top 8%)
CISA exploited list	No
Weakness	CWE-1321
Published	2020-10-29
Last modified	2026-06-17

Publisher (CNA): Snyk · Vendor: chartjs

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2020-10-29 08:15 UTCPublished CVE record published
2026-06-17 03:25 UTCUpdated Record last modified

chartjs chart.js UPGRADE

Affected: < 2.9.4

Fixed in: 2.9.4

Safe to downgrade to: no unaffected older release

1. Check installed version

npm ls chart.js

2. UPGRADE to 2.9.4

npm install chart.js@">=2.9.4"

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-7746?

chart.js: upgrade to 2.9.4. Exact commands for each OS are on this page.

Is CVE-2020-7746 being exploited?

CVE-2020-7746 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-7746 affect?

CVE-2020-7746 affects chart.js. Severity is high (CVSS 7.5). 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. Ho

How urgent is CVE-2020-7746?

Priority 59/100. High severity; EPSS top 8%: very likely to be exploited; Public exploit reference; Remotely exploitable, no login, no user action

References

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