CVE-2026-118252 Highcharts Dashboards: sidebar component labels are parsed as HTML
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-118252?
CVE-2026-118252 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 sidebar parses component language strings as HTML rather than inserting them as text. An attacker who controls the Dashboards language configuration can provide markup containing event handlers, which execute in the hosting page origin when a user opens the edit-mode sidebar and the affected labels render. This issue is fixed in 4.2.3.
Weakness: CWE-79
Which versions are affected by CVE-2026-118252?
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-2026-118252?
Upgrade @highcharts/dashboards to 4.2.3 or later.
Is CVE-2026-118252 being exploited?
There is no known exploitation of CVE-2026-118252 in the wild and no public exploit code.
Sources
Also known as GHSA-rcqf-f6h2-ccg9.