Live › vulnerability › CVE-2026-118246
Go to dashboardHighcharts JS applies breadcrumbs.style as SVG attributes without filtering attribute names, so event-handler keys supplied through chart configuration become live handlers on breadcrumb buttons. When a user navigates to a drilldown level and hovers or clicks the button, the attacker's script runs in the hosting page's origin.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-28 18:34 UTC. All times on this page are UTC.
Exposure requires that an attacker can influence chart configuration, such as drilldown or breadcrumb options built from user input, stored data or a CMS field. Charts built only from fixed, developer-written configuration and charts using styled mode are not affected.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| highcharts | npm | >= 10.0.0, < 11.4.9 | 11.4.9 |
| highcharts | npm | >= 12.0.0, < 12.6.1 | 12.6.1 |
| highcharts | npm | >= 13.0.0, <= 13.0.2 | 13.1.0 |
npm ls highcharts and look for versions from 10.0.0 up to but not including 11.4.9, 12.6.1, or 13.1.0breadcrumbs next to drilldown or navigation options and confirm whether any chart configuration is built from user-controlled data11.4.9, 12.6.1, or 13.1.0 depending on the major version in useEach row is the first time that source carried this signal. The analyst’s rows are its own findings.
The breadcrumbs style option is applied to the breadcrumb button as SVG attributes rather than as CSS, and the attribute names are not filtered. An attacker who controls the chart configuration can supply keys under breadcrumbs.style that name event handlers, and those keys become live handlers on the breadcrumb button, so the attacker's script runs in the origin of the page hosting the chart. The option is reached through drilldown.breadcrumbs, navigation.breadcrumbs and the breadcrumbs option of the treemap, sunburst and treegraph series. Exploitation requires that untrusted data reach the chart configuration and that a user drill down, or traverse into a level of a hierarchical series, so that the breadcrumbs render, and then hover over or activate the breadcrumb button. Charts rendered in styled mode do not apply the option and are not affected. Charts built with Highcharts Stock, Maps and Gantt are included, since those ship from the same package as Core.
Verified against published bundles on 10.0.0, 11.4.8, 12.3.0 and 13.0.2.
Load immediately after Highcharts, before any chart is created:
// Workaround fix for all affected Highcharts versions: 10.0.0-13.0.2
((H)=>{const S=H.SVGElement.prototype,D=S._defaultSetter;S._defaultSetter=function _defaultSetter(v,k,e){/^on/i.test(k)||D.call(this,v,k,e)};})(Highcharts);
// End of the workaround fix
The patched releases are available from all the usual distribution channels. With npm, upgrade the affected package to the patched version listed above, for example npm install [email protected]. If you load Highcharts from the CDN, use the versioned URLs on code.highcharts.com, for example https://code.highcharts.com/13.1.0/highcharts.js. For more on each installation method, see the installation guide.
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