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CVE-2026-116796 · GHSA-mw4f-gj5x-6xr4

Highcharts Core: `javascript:` URL in an `xlink:href` attribute survives text filtering and reaches exported charts

Risk score
48/100
CVSS
7.2 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 10.3.2 until 11.4.9, 12.6.2, and 13.1.1, Highcharts accepts an SVG anchor xlink:href attribute without applying the allowed-scheme check used for href and src. An attacker who controls a chart text option can preserve a javascript URL in serialized char…
Affected
highcharts (npm) >= 10.3.2, < 11.4.9; highcharts (npm) >= 12.0.0, < 12.6.2; highcharts (npm) >= 13.0.0, <= 13.1.0
Fix
Upgrade highcharts to 11.4.9 or 12.6.2 or 13.1.1 (whichever matches your release line) or later.
Exploitation
No known exploitation

Story map

Story map: highchartsTHE FLAWSTHE FIXCVE-2026-116796Highcharts Core: `javascript:`URL in an `xlink:href`attribute survives text…CVSS 7.2CVE-2026-118246Highcharts Core:`breadcrumbs.style` keysbecome SVG event-handler…CVSS 8.4CVE-2026-118251Highcharts: `javascript:` URLin credits.href runs script onclickCVSS 8.4CVE-2026-118244Highcharts Core: HTML textparsing falls back to unfiltered`innerHTML` during printingCVSS 7.2Upgrade highcharts11.4.9 · 12.6.2 · 13.1.1 · 12.6.1 ·13.1.0or later on your release lineWho is exposedhighcharts (npm) >= 10.0.0, <11.4.9; highcharts (npm) >=12.0.0, < 12.6.1; highcharts (npm)>= 13.0.0, <= 13.0.2YELLOW · PLAN IT INhighchartsHighcharts JS is a JavaScriptcharting library based on SVG.From 10.0.0 until 11.4.9, 12.6.1,and 13.1.0, Highcharts appliesbreadcrumbs.style as SVGattributes rather than CSS anddoes not filter the attribute…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: Yellow, plan it in. Highcharts JS is a JavaScript charting library based on SVG. From 10.0.0 until 11.4.9, 12.6.1, and 13.1.0, Highcharts applies breadcrumbs.style as SVG attributes rather than CSS and does not filter the attribute names. An attacker who controls chart configuration can provide event-handler keys through drilldown.breadc…

The flaws

  • CVE-2026-116796: Highcharts Core: `javascript:` URL in an `xlink:href` attribute survives text filtering and reaches exported charts (CVSS 7.2)
  • CVE-2026-118246: Highcharts Core: `breadcrumbs.style` keys become SVG event-handler attributes (CVSS 8.4)
  • CVE-2026-118251: Highcharts: `javascript:` URL in credits.href runs script on click (CVSS 8.4)
  • CVE-2026-118244: Highcharts Core: HTML text parsing falls back to unfiltered `innerHTML` during printing (CVSS 7.2)

The fix

Upgrade highcharts: 11.4.9 · 12.6.2 · 13.1.1 · 12.6.1 · 13.1.0 or later on your release line

Who is exposed: highcharts (npm) >= 10.0.0, < 11.4.9; highcharts (npm) >= 12.0.0, < 12.6.1; highcharts (npm) >= 13.0.0, <= 13.0.2

Where it stands

  • No known exploitation

Connects to

Why it is Yellow

  • CVSS 7.2 high
  • On your watchlist: npm

Affected packages

PackageEcosystemVulnerableFixed in
highchartsnpm>= 10.3.2, < 11.4.911.4.9
highchartsnpm>= 12.0.0, < 12.6.212.6.2
highchartsnpm>= 13.0.0, <= 13.1.013.1.1

References

Original description

Highcharts JS is a JavaScript charting library based on SVG. From 10.3.2 until 11.4.9, 12.6.2, and 13.1.1, Highcharts accepts an SVG anchor xlink:href attribute without applying the allowed-scheme check used for href and src. An attacker who controls a chart text option can preserve a javascript URL in serialized chart output. When exported or server-rendered SVG is parsed again and a user activates the link, script runs in the origin of that document. This issue is fixed in 11.4.9, 12.6.2 and 13.1.1.

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