{"id":"CVE-2026-118249","revision":"4cfafe842f1e4574bccfd0e3ed4a5fb6","records":[{"revision":"4cfafe842f1e4574bccfd0e3ed4a5fb6","observedAt":"2026-10-29T21:48:56.968+00:00","statement":{"source":"cve-program","id":"CVE-2026-118249","aliases":[],"title":"Highcharts: series column construction writes to Object.prototype","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.","state":0,"publishedAt":"2026-10-28T17:57:18.323+00:00","modifiedAt":"2026-10-29T20:55:21.954+00:00","affected":[{"ecosystem":"Vendor product","name":"highcharts","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"highcharts\",\n                    \"product\": \"highcharts\",\n                    \"versions\": [\n                        {\n                            \"version\": \">= 13.0.0, < 13.1.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:H/VA:H/SC:L/SI:L/SA:L","score":7.2,"severity":"HIGH"}],"references":["https://github.com/highcharts/highcharts/security/advisories/GHSA-gfvx-2c2g-38wq","https://github.com/highcharts/highcharts/pull/25321","https://github.com/highcharts/highcharts/commit/d3357705c8f348904441327e32f50ab528c3a205","https://github.com/highcharts/highcharts/releases/tag/v13.1.0"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-118249","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-118249","identifiers":["CVE-2026-118249"]},"retained":false,"historicalAffected":[]}],"coverage":[]}