high7.2
CVE-2026-118250
Highcharts: dotted series.keys paths write to Object.prototype
Impact
Highcharts JS is a JavaScript charting library based on SVG. From 6.1.0 until 11.4.9, 12.6.1, and 3.1.0, Highcharts follows dot-separated series.keys paths without filtering each segment. An attacker who controls series.keys and matching point data can use a path through __proto__ to assign arbitrary named properties to Object.prototype. Those properties are visible to all JavaScript in the page, and no user interaction is required beyond rendering the chart. This issue is fixed in 11.4.9, 12.6.1, and 3.1.0.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | highcharts | >= 12.0.0, < 12.6.1 | 12.6.1 |
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Highcharts | Highcharts | from 13.0.0, before 13.1.0 from 12.0.0, before 12.6.1 from 6.1.0, before 11.4.9 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-rmqc-xvr3-v46c
- https://github.com/highcharts/highcharts/security/advisories/GHSA-rmqc-xvr3-v46c
- https://nvd.nist.gov/vuln/detail/CVE-2026-118250
- https://github.com/highcharts/highcharts/pull/25313
- https://github.com/highcharts/highcharts/commit/fd4ee8140732618bbe71295aba55398fb1f8fa9e
- https://github.com/highcharts/highcharts/releases/tag/v13.1.0