{"id":"CVE-2026-118249","published":"2026-10-28T17:57:18Z","modified":"2026-10-29T20:55:21Z","title":"Highcharts: series column construction writes to Object.prototype","vendor":"highcharts","product":"highcharts","tier":"tail","description":{"text":"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.","provenance":"source","from":"CVE.org"},"cvss":{"score":7.2,"severity":"HIGH","version":"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","provenance":"source","from":"CVE.org CNA"},"epss":{"score":0.00363,"percentile":0.30162,"provenance":"source"},"cwes":[{"id":"CWE-1321","name":"Improperly Controlled Modification of Object Prototype Attributes"}],"references":[{"url":"https://github.com/highcharts/highcharts/security/advisories/GHSA-gfvx-2c2g-38wq","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/highcharts/highcharts/pull/25321","tags":["x_refsource_MISC"]},{"url":"https://github.com/highcharts/highcharts/commit/d3357705c8f348904441327e32f50ab528c3a205","tags":["x_refsource_MISC"]},{"url":"https://github.com/highcharts/highcharts/releases/tag/v13.1.0","tags":["x_refsource_MISC"]}],"priority":{"score":11.1,"factors":[{"name":"EPSS percentile","points":6.03},{"name":"CVSS severity","points":5.04}]},"vendorSlug":"highcharts","affectedVersions":[{"vendor":"highcharts","product":"highcharts","versions":[">= 13.0.0, < 13.1.0"]}],"affected":[{"ecosystem":"npm","package":"highcharts","vulnerableRanges":[">=13.0.0, <13.1.0"],"patched":["13.1.0"],"from":["GHSA-gfvx-2c2g-38wq"],"provenance":"source"}],"euvd":{"id":"EUVD-2026-112363","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-highcharts-cve-2026-107588","parents":[{"from":"CVE-2026-107588","to":"CVE-2026-118249","relation":"related","confidence":"high","kind":"lineage","evidence":[{"kind":"osv-related","provenance":"source","id":"GHSA-gfvx-2c2g-38wq","via":"related"}]}]}}