high7.2
CVE-2026-118249
Highcharts: series column construction writes to Object.prototype
Impact
Highcharts JS is a JavaScript charting library based on SVG. From 13.0.0 until 13.1.0, Highcharts builds series data columns by using point option keys directly as column IDs. Own enumerable __proto__ and constructor keys from parsed point objects can therefore direct integer-indexed writes to Object.prototype or the Object constructor. The inherited values affect reads and for-in enumeration across the page and can disrupt rendering or alter consuming application behavior without user interaction beyond rendering the chart. This issue is fixed in 13.1.0.
Affected packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| npm | highcharts | >= 13.0.0, <= 13.0.2 | 13.1.0 |
Weakness classification
References
- NVD record
- CVE.org record
- GitHub advisory
- https://github.com/advisories/GHSA-gfvx-2c2g-38wq
- https://github.com/highcharts/highcharts/security/advisories/GHSA-gfvx-2c2g-38wq
- https://nvd.nist.gov/vuln/detail/CVE-2026-118249
- https://github.com/highcharts/highcharts/pull/25321
- https://github.com/highcharts/highcharts/commit/d3357705c8f348904441327e32f50ab528c3a205
- https://github.com/highcharts/highcharts/releases/tag/v13.1.0