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CVE-2026-118245— Highcharts Dashboards: `chartConstructor` is an unchecked lookup into the Highcharts namespace

Quick assessment

Affected
highcharts highcharts
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Highcharts JS 是一个基于 SVG 的 JavaScript 图表库。在 1.0.0 至 4.2.2 版本期间，Highcharts Dashboards 在 Highcharts 命名空间中使用 属性进行未经验查的属性查找，并调用所选成员，传入组件容器和图表选项。若攻击者能够控制仪表板配置，即可选择公共工具函数而非受支持的图表构造函数，导致由攻击者控制的选项被作为属性或属性值复制到容器中。当仪表板渲染时，这些标记和事件处理程序将在宿主页面上下文中执行。此漏洞无需用户除渲染仪表板之外的任何交互即可触发。

CVSS 8.6 · High

Affected Version Matrix 2

VendorProduct Version RangeStatus
@highcharts dashboards >= 1.0.0, < 4.2.3 affected
highcharts highcharts < 13.1.0 affected
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I. Basic Information for CVE-2026-118245

Vulnerability Information
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Vulnerability Title
Highcharts Dashboards: `chartConstructor` is an unchecked lookup into the Highcharts namespace
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
highcharts highcharts < 13.1.0 -
@highcharts dashboards >= 1.0.0, < 4.2.3 -

II. Public POCs for CVE-2026-118245

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III. Intelligence Information for CVE-2026-118245

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Other References for CVE-2026-118245 (3)

Same Patch Batch · highcharts · 2026-10-28 · 16 CVEs total

CVE-2026-118254 8.6 HIGH Highcharts Grid: pagination language options are parsed as HTML
CVE-2026-116797 8.5 HIGH Highcharts Grid Pro: cell-renderer `attributes` map written with raw `setAttribute`
CVE-2026-118242 8.5 HIGH Highcharts Grid: custom icon definition objects written with raw `setAttribute` on `<path>
CVE-2026-118246 8.4 HIGH Highcharts Core: `breadcrumbs.style` keys become SVG event-handler attributes
CVE-2026-118253 8.4 HIGH Highcharts Dashboards: fullscreen labels are parsed as HTML
CVE-2026-118251 8.4 HIGH Highcharts: javascript: URL in credits.href runs script on click
CVE-2026-118252 8.4 HIGH Highcharts Dashboards: sidebar component labels are parsed as HTML
CVE-2026-118255 8.4 HIGH Highcharts Grid: javascript: URL in credits.href runs script on click
CVE-2026-116796 7.2 HIGH Highcharts Core: `javascript:` URL in an `xlink:href` attribute survives text filtering an
CVE-2026-118244 7.2 HIGH Highcharts Core: AST `DOMParser` fallback assigns unsanitized markup to `innerHTML` during
CVE-2026-118250 7.2 HIGH Highcharts: dotted series.keys paths write to Object.prototype
CVE-2026-118249 7.2 HIGH Highcharts: series column construction writes to Object.prototype
CVE-2026-118247 6.9 MEDIUM Highcharts Dashboards / Grid Pro: `DataTable.setCell` and column writers treat `__proto__`
CVE-2026-118248 6.9 MEDIUM Highcharts Dashboards: editableOptions.propertyPath writes to Object.prototype
CVE-2026-118243 5.3 MEDIUM Highcharts Dashboards: `__proto__` data table id writes sync listeners to `Object.prototyp

IV. Related Vulnerabilities

Same product: highcharts
Same vendor: highcharts
Same weakness: CWE-79