Vulnerability · Published Oct 28, 2026 · Assigned by GitHub_M
CVE-2026-118253Highcharts Dashboards: fullscreen labels are parsed as HTML
High 8.4
In plain English
A high-severity cross-site scripting in dashboards from @highcharts. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 36% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
Highcharts JS is a JavaScript charting library based on SVG. From 1.0.0 until 4.2.3, Highcharts Dashboards edit mode parses fullscreen language labels as HTML rather than inserting them as text. An attacker who controls Dashboards language options can supply markup with event handlers, which execute in the hosting page origin when the fullscreen control is rendered. The label is reachable only when edit mode is enabled and viewFullscreen is present in the context-menu items. This issue is fixed in 4.2.3.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| npm | @highcharts/dashboards | 4.2.3 | GHSA-58g7-7f52-h92c |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| highcharts | highcharts | < 13.0.0-beta.2 |
| @highcharts | dashboards | >= 1.0.0, < 4.2.3 |
Weakness: CWE-79 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N