CVE-2026-118250
Highcharts: dotted series.keys paths write to Object.prototype
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-1321 |
| Vendor | highcharts |
| Product | highcharts |
| Published | Oct 28, 2026 |
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Affected Versions
highcharts / highcharts
>= 6.1.0, < 11.4.9 >= 12.0.0, < 12.6.1 >= 13.0.0, < 13.1.0
References
github.com: https://github.com/highcharts/highcharts/security/advisories/GHSA-rmqc-xvr3-v46c github.com: https://github.com/highcharts/highcharts/pull/25313 github.com: https://github.com/highcharts/highcharts/commit/fd4ee8140732618bbe71295aba55398fb1f8fa9e github.com: https://github.com/highcharts/highcharts/releases/tag/v13.1.0