Skip to content
OpenAdvisories
High · 7.2 CVE-2026-118250 EUVD-2026-112364GHSA-rmqc-xvr3-v46c

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

Published Oct 28, 2026 · Updated Nov 3, 2026 · Assigned by GitHub_M

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

VendorProductAffectedFixed
highcharts highcharts >= 6.1.0, < 11.4.9, >= 12.0.0, < 12.6.1, >= 13.0.0, < 13.1.0 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm highcharts >= 12.0.0, < 12.6.1 12.6.1 GHSA-rmqc-xvr3-v46c
npm highcharts >= 13.0.0, < 13.1.0 13.1.0 GHSA-rmqc-xvr3-v46c
npm highcharts >= 6.1.0, < 11.4.9 11.4.9 GHSA-rmqc-xvr3-v46c

References