CVE-2026-118245
HighCVSS 8.6Exploitation Probability (EPSS)
Low risk27th percentile - higher than 27% of all known CVEs
Summary
Highcharts Dashboards from 1.0.0 until 4.2.2 uses chartConstructor as an unchecked property lookup in the Highcharts namespace and invokes the selected member with the component container and chartOptions. An attacker who controls dashboard configuration can select a public utility function instead of a supported chart constructor, causing attacker-controlled options to be copied to the container as properties or attributes, and then markup and event handlers can execute in the hosting page origin when the board renders.
Risk Assessment
This could lead to execution of malicious JavaScript in the user's page context, such as data theft or performing actions on behalf of the user.
Recommendation
Update Highcharts Dashboards to version 4.2.2, which fixes the vulnerability.
Other vulnerabilities in Highcharts Dashboards
See all- CVE-2026-118253High
Highcharts JS is a JavaScript charting library based on SVG. From 1.0.0 until 4.2.3, Highcharts Dashboards edit mode parses fullscreen language labels as HTML rather than inserting them as text. An attacker who controls Dashboards language options can supply markup with event handlers, which execute in the hosting page origin when the fullscreen control is rendered. The label is reachable only when edit mode is enabled and viewFullscreen is present in the context-menu items. This issue is fixed in 4.2.3.
- CVE-2026-118252High
In Highcharts Dashboards, the edit-mode sidebar parses component language strings as HTML rather than inserting them as text. An attacker controlling the Dashboards language configuration can supply markup with event handlers that execute in the hosting page origin when the sidebar is opened. This is fixed in 4.2.3.
- CVE-2026-118248Medium
Highcharts Dashboards edit mode walks editableOptions propertyPath segments without rejecting prototype-related keys. An attacker controlling editableOptions can provide a path through __proto__ or constructor, and a user's edit writes the configured value onto Object.prototype, affecting JavaScript throughout the page. This is fixed in 4.2.2.
- CVE-2026-118243Medium
Highcharts Dashboards stores DataCursor listener and state maps in plain objects keyed by DataTable ID. A __proto__ table ID supplied through dataPool connector configuration resolves to Object.prototype, creating an enumerable property visible on every object that can throw and break features such as extremes synchronization. The issue affects versions 1.0.0 through 4.2.2 and is fixed in 4.2.2.
Original NVD description (English source)
Highcharts JS is a JavaScript charting library based on SVG. From 1.0.0 until 4.2.2, Highcharts Dashboards uses chartConstructor as an unchecked property lookup in the Highcharts namespace and invokes the selected member with the component container and chartOptions. An attacker who controls dashboard configuration can select a public utility function instead of a supported chart constructor, causing attacker-controlled options to be copied to the container as properties or attributes. Markup and event handlers can then execute in the hosting page origin when the board renders. No user interaction beyond rendering the board is required. This issue is fixed in 4.2.2.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS