CVE-2026-118248
Highcharts JS is a JavaScript charting library based on SVG
- Risk score
- 41/100
- CVSS
- 6.9 v4.0
- Published
- 28 Oct 2026
Open in the live forecast Today's forecast
What to know
- What it is
- Highcharts JS is a JavaScript charting library based on SVG. From 1.0.0 until 4.2.2, Highcharts Dashboards edit mode walks editableOptions propertyPath segments without rejecting prototype-related keys. An attacker who controls editableOptions can provide a path through __proto__ or constructor, and a user's edit writ…
- Affected
- See advisory
- Fix
- Upgrade the product to 4.2.2 or later.
- Exploitation
- No known exploitation
Why it is Yellow
- CVSS 6.9 medium
References
Original description
Highcharts JS is a JavaScript charting library based on SVG. From 1.0.0 until 4.2.2, Highcharts Dashboards edit mode walks editableOptions propertyPath segments without rejecting prototype-related keys. An attacker who controls editableOptions can provide a path through __proto__ or constructor, and a user's edit writes the configured value onto Object.prototype. The property then becomes visible to JavaScript throughout the page, with consequences determined by the consuming application. This issue is fixed in 4.2.2.
Last activity 28 Oct 2026. Patch Forecast updates every hour.