Vulnerability Description
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.
Related Weaknesses (CWE)
References
- https://github.com/highcharts/highcharts/commit/fd4ee8140732618bbe71295aba55398f
- https://github.com/highcharts/highcharts/pull/25313
- https://github.com/highcharts/highcharts/releases/tag/v13.1.0
- https://github.com/highcharts/highcharts/security/advisories/GHSA-rmqc-xvr3-v46c
FAQ
What is CVE-2026-118250?
CVE-2026-118250 is a documented vulnerability. 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 ...
How severe is CVE-2026-118250?
CVSS scoring is not yet available for CVE-2026-118250. Check NVD for updates.
Is there a patch for CVE-2026-118250?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.