{"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": "2026-10-28T17:57:18.323Z"}, "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"}}}}

{}

{"affected": [{"affectedData": [{"product": "highcharts", "vendor": "highcharts", "versions": [{"status": "affected", "version": ">= 13.0.0, < 13.1.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "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."}], "id": "CVE-2026-118249", "lastModified": "2026-10-28T18:17:16.273", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 7.2, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "LOW", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-28T18:17:16.273", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/highcharts/highcharts/commit/d3357705c8f348904441327e32f50ab528c3a205"}, {"source": "security-advisories@github.com", "url": "https://github.com/highcharts/highcharts/pull/25321"}, {"source": "security-advisories@github.com", "url": "https://github.com/highcharts/highcharts/releases/tag/v13.1.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/highcharts/highcharts/security/advisories/GHSA-gfvx-2c2g-38wq"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1321"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}