Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://github.com/highcharts/highcharts/commit/d3357705c8f348904441327e32f50ab5
- https://github.com/highcharts/highcharts/pull/25321
- https://github.com/highcharts/highcharts/releases/tag/v13.1.0
- https://github.com/highcharts/highcharts/security/advisories/GHSA-gfvx-2c2g-38wq
FAQ
What is CVE-2026-118249?
CVE-2026-118249 is a documented vulnerability. 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__...
How severe is CVE-2026-118249?
CVSS scoring is not yet available for CVE-2026-118249. Check NVD for updates.
Is there a patch for CVE-2026-118249?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.