Quick answers
- Is CVE-2026-118246 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-118246 being exploited in the wild.
- How severe is CVE-2026-118246?
- High severity, with a CVSS score of 4, published 28 October 2026.
- Which products and versions are affected?
- Highcharts 10.0.0 to 11.4.8, 12.0.0 to 12.6.0, 13.0.0 to 13.0.x; highcharts (npm) >= 10.0.0, < 11.4.9, SEMVER:introduced=10.0.0,fixed=11.4.9.
- Is there a fix for CVE-2026-118246?
- Yes. highcharts (npm): upgrade to 11.4.9 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-118246 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-118246?
- Check whether you run Highcharts or highcharts (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- highcharts (npm): upgrade to 11.4.9 or later
npm install highcharts@11.4.9
Technical details
The vulnerability stems from Highcharts applying breadcrumb.style configuration as SVG attributes without filtering attribute names, allowing injection of event handler attributes (onmouseover, onclick, etc.) through drilldown.breadcrumbs, navigation.breadcrumbs, or hierarchical series breadcrumb options. An attacker who controls chart configuration (e.g., via user-supplied data or XSS) can inject these handlers, which execute in the hosting page origin when the user navigates to a chart level and hovers over or clicks the breadcrumb button. Styled-mode charts are not affected as they apply styles via CSS rather than attributes.
Affected products
- Highcharts Highcharts 10.0.0 to 11.4.8, 12.0.0 to 12.6.0, 13.0.0 to 13.0.x
Identifiers
- CVE-2026-118246
- GHSA-35rr-xwfh-x789
Timeline
- 2026-10-28: disclosed