CVE-2026-116796 Highcharts Core: `javascript:` URL in an `xlink:href` attribute survives text filtering and reaches exported charts
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-116796?
CVE-2026-116796 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 10.3.2 until 11.4.9, 12.6.2, and 13.1.1, Highcharts accepts an SVG anchor xlink:href attribute without applying the allowed-scheme check used for href and src. An attacker who controls a chart text option can preserve a javascript URL in serialized chart output. When exported or server-rendered SVG is parsed again and a user activates the link, script runs in the origin of that document. This issue is fixed in 11.4.9, 12.6.2 and 13.1.1.
Weakness: CWE-79
Which versions are affected by CVE-2026-116796?
6 open source packages ship an affected version, including highcharts.
| Package | Affected | Fixed in |
|---|---|---|
highcharts npm | From 10.3.2 | 11.4.9 |
highcharts npm | From 10.3.2 | 11.4.9 |
highcharts npm | From 12.0.0 | 12.6.2 |
highcharts npm | From 12.0.0 | 12.6.2 |
highcharts npm | From 13.0.0 | 13.1.1 |
highcharts npm | From 13.0.0 | 13.1.1 |
How do I fix CVE-2026-116796?
Upgrade highcharts to a fixed version for your release line: 11.4.9, 12.6.2 or 13.1.1.
Is CVE-2026-116796 being exploited?
There is no known exploitation of CVE-2026-116796 in the wild and no public exploit code.
Sources
Also known as GHSA-mw4f-gj5x-6xr4.