{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-118249","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-10-27T20:13:55.313Z","datePublished":"2026-10-28T17:57:18.323Z","dateUpdated":"2026-10-29T20:55:21.954Z"},"containers":{"cna":{"title":"Highcharts: series column construction writes to Object.prototype","problemTypes":[{"descriptions":[{"cweId":"CWE-1321","lang":"en","description":"CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')","type":"CWE"}]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"LOW","subIntegrityImpact":"LOW","subAvailabilityImpact":"LOW","baseScore":7.2,"baseSeverity":"HIGH","vectorString":"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","version":"4.0"}}],"references":[{"name":"https://github.com/highcharts/highcharts/security/advisories/GHSA-gfvx-2c2g-38wq","tags":["x_refsource_CONFIRM"],"url":"https://github.com/highcharts/highcharts/security/advisories/GHSA-gfvx-2c2g-38wq"},{"name":"https://github.com/highcharts/highcharts/pull/25321","tags":["x_refsource_MISC"],"url":"https://github.com/highcharts/highcharts/pull/25321"},{"name":"https://github.com/highcharts/highcharts/commit/d3357705c8f348904441327e32f50ab528c3a205","tags":["x_refsource_MISC"],"url":"https://github.com/highcharts/highcharts/commit/d3357705c8f348904441327e32f50ab528c3a205"},{"name":"https://github.com/highcharts/highcharts/releases/tag/v13.1.0","tags":["x_refsource_MISC"],"url":"https://github.com/highcharts/highcharts/releases/tag/v13.1.0"}],"affected":[{"vendor":"highcharts","product":"highcharts","versions":[{"version":">= 13.0.0, < 13.1.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-10-28T17:57:18.323Z"},"descriptions":[{"lang":"en","value":"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."}],"source":{"advisory":"GHSA-gfvx-2c2g-38wq","discovery":"UNKNOWN"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-10-29T15:28:32.137806Z","id":"CVE-2026-118249","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-10-29T20:55:21.954Z"}}]}}