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CVE PROGRAM SOURCE RECORD7.2 High

CVE-2026-118250

Highcharts: dotted series.keys paths write to Object.prototype

Description

Highcharts JS is a JavaScript charting library based on SVG. From 6.1.0 until 11.4.9, 12.6.1, and 3.1.0, Highcharts follows dot-separated series.keys paths without filtering each segment. An attacker who controls series.keys and matching point data can use a path through __proto__ to assign arbitrary named properties to Object.prototype. Those properties are visible to all JavaScript in the page, and no user interaction is required beyond rendering the chart. This issue is fixed in 11.4.9, 12.6.1, and 3.1.0.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

highcharts highcharts

  • >= 6.1.0, < 11.4.9affected
  • >= 12.0.0, < 12.6.1affected
  • >= 13.0.0, < 13.1.0affected

References