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CVE-2026-118252 · GHSA-rcqf-f6h2-ccg9

Highcharts Dashboards parses sidebar component labels as HTML

Risk score
55/100
CVSS
8.4 v4.0
Published
28 Oct 2026

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What to know

What it is
Highcharts JS is a JavaScript charting library based on SVG. From 1.0.0 until 4.2.3, Highcharts Dashboards edit-mode sidebar parses component language strings as HTML rather than inserting them as text. An attacker who controls the Dashboards language configuration can provide markup containing event handlers, which e…
Affected
@highcharts/dashboards (npm) >= 1.0.0, <= 4.2.2
Fix
Upgrade @highcharts/dashboards to 4.2.3 or later.
Exploitation
No known exploitation

Story map

Story map: @highcharts/dashboardsTHE FLAWSTHE FIXCVE-2026-118252Highcharts Dashboards parsessidebar component labels asHTMLCVSS 8.4CVE-2026-118245Highcharts Dashboards:`chartConstructor` is anunchecked lookup into the…CVSS 8.6CVE-2026-118255Highcharts Grid: `javascript:`URL in credits.href runs scripton clickCVSS 8.4CVE-2026-118253Highcharts Dashboards parsesfullscreen labels as HTMLCVSS 8.4Upgrade…4.2.3 · 4.2.2or later on your release lineWho is exposed@highcharts/dashboards (npm)>= 1.0.0, <= 4.2.1YELLOW · PLAN IT IN@highcharts/dashboardsHighcharts JS is a JavaScriptcharting library based on SVG.From 1.0.0 until 4.2.2,Highcharts Dashboards useschartConstructor as anunchecked property lookup in theHighcharts namespace and…Where it standsNo known exploitationCONNECTS TOSame weaknessCross-site scripting (CWE-79)400 other warnings in 30 days →
Story map: the flaws, the fix, how it unfolded and what it connects to. Boxes link to the record or article.

At a glance

@highcharts/dashboards: Yellow, plan it in. 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 ca…

The flaws

  • CVE-2026-118252: Highcharts Dashboards parses sidebar component labels as HTML (CVSS 8.4)
  • CVE-2026-118245: Highcharts Dashboards: `chartConstructor` is an unchecked lookup into the Highcharts namespace (CVSS 8.6)
  • CVE-2026-118255: Highcharts Grid: `javascript:` URL in credits.href runs script on click (CVSS 8.4)
  • CVE-2026-118253: Highcharts Dashboards parses fullscreen labels as HTML (CVSS 8.4)

The fix

Upgrade @highcharts/dashboards: 4.2.3 · 4.2.2 or later on your release line

Who is exposed: @highcharts/dashboards (npm) >= 1.0.0, <= 4.2.1

Where it stands

  • No known exploitation

Connects to

Why it is Yellow

  • CVSS 8.4 high
  • On your watchlist: npm

Affected packages

PackageEcosystemVulnerableFixed in
@highcharts/dashboardsnpm>= 1.0.0, <= 4.2.24.2.3

References

Original description

Highcharts JS is a JavaScript charting library based on SVG. From 1.0.0 until 4.2.3, Highcharts Dashboards edit-mode sidebar parses component language strings as HTML rather than inserting them as text. An attacker who controls the Dashboards language configuration can provide markup containing event handlers, which execute in the hosting page origin when a user opens the edit-mode sidebar and the affected labels render. This issue is fixed in 4.2.3.

Last activity 28 Oct 2026. Patch Forecast updates every hour.