CVE-2026-118249

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.

• https://github.com/highcharts/highcharts/commit/d3357705c8f348904441327e32f50ab528c3a205
• 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

• https://github.com/highcharts/highcharts/commit/d3357705c8f348904441327e32f50ab528c3a205
• 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

• HIGHCVE-2021-48012PoC
• UNSCOREDCVE-2026-101900PoC
• UNSCOREDCVE-2026-101902PoC
• UNSCOREDCVE-2026-101904PoC
• UNSCOREDCVE-2026-101905PoC
• UNSCOREDCVE-2026-101908PoC
• UNSCOREDCVE-2026-101909PoC
• HIGHCVE-2026-102600PoC

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