CVE-2020-7746: Chartjs Chart.js

Critical severity, CVSS 9.8. EPSS: 4.7% chance of exploitation in the next 30 days.

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.

Affected products

• Chartjs Chart.js: before 2.9.4 (fixed in 2.9.4)

Published 2020-10-29. Last modified 2026-06-17.