CVE-2026-118246 Highcharts Core: `breadcrumbs.style` keys become SVG event-handler attributes
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-118246?
CVE-2026-118246 is a high-severity vulnerability in highcharts, published on 28 Oct 2026.
Official description
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.breadcrumbs, navigation.breadcrumbs, or hierarchical series breadcrumb options. The keys become active handlers on the breadcrumb button and execute in the hosting page origin after the user navigates to a level and hovers over or activates the button. Styled-mode charts do not apply this option and are not affected. This issue is fixed in 11.4.9, 12.6.1 and 13.1.0.
Weakness: CWE-79
Which versions are affected by CVE-2026-118246?
6 open source packages ship an affected version, including highcharts.
| Package | Affected | Fixed in |
|---|---|---|
highcharts npm | From 10.0.0 | 11.4.9 |
highcharts npm | From 10.0.0 | 11.4.9 |
highcharts npm | From 12.0.0 | 12.6.1 |
highcharts npm | From 12.0.0 | 12.6.1 |
highcharts npm | From 13.0.0 | 13.1.0 |
highcharts npm | From 13.0.0 | 13.1.0 |
How do I fix CVE-2026-118246?
Upgrade highcharts to a fixed version for your release line: 11.4.9, 12.6.1 or 13.1.0.
Is CVE-2026-118246 being exploited?
There is no known exploitation of CVE-2026-118246 in the wild and no public exploit code.
Sources
Also known as GHSA-35rr-xwfh-x789.