CVE-2026-118253 Highcharts Dashboards: fullscreen labels are parsed as HTML
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-118253?
CVE-2026-118253 is a high-severity vulnerability in @highcharts dashboards, published on 28 Oct 2026.
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.
Weakness: CWE-79
Which versions are affected by CVE-2026-118253?
2 open source packages ship an affected version, including @highcharts/dashboards.
| Package | Affected | Fixed in |
|---|---|---|
@highcharts/dashboards npm | From 1.0.0 | 4.2.3 |
@highcharts/dashboards npm | From 1.0.0 | 4.2.3 |
How do I fix CVE-2026-118253?
Upgrade @highcharts/dashboards to 4.2.3 or later.
Is CVE-2026-118253 being exploited?
There is no known exploitation of CVE-2026-118253 in the wild and no public exploit code.
Sources
Also known as GHSA-58g7-7f52-h92c.