{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-118247", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-10-27T20:13:55.313Z", "datePublished": "2026-10-28T17:50:59.526Z", "dateUpdated": "2026-10-28T17:50:59.526Z"}, "containers": {"cna": {"title": "Highcharts Dashboards / Grid Pro: `DataTable.setCell` and column writers treat `__proto__` as an existing column.", "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": "ACTIVE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "LOW", "subIntegrityImpact": "LOW", "subAvailabilityImpact": "LOW", "baseScore": 6.9, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:L/VA:H/SC:L/SI:L/SA:L", "version": "4.0"}}], "references": [{"name": "https://github.com/highcharts/highcharts/security/advisories/GHSA-c75x-9x9h-28rm", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/highcharts/highcharts/security/advisories/GHSA-c75x-9x9h-28rm"}, {"name": "https://github.com/highcharts/highcharts/commit/02dd9349aeb6f4cc9c98806120d917ed316b4c74", "tags": ["x_refsource_MISC"], "url": "https://github.com/highcharts/highcharts/commit/02dd9349aeb6f4cc9c98806120d917ed316b4c74"}, {"name": "https://github.com/highcharts/highcharts/releases/tag/dashboards-v4.2.2", "tags": ["x_refsource_MISC"], "url": "https://github.com/highcharts/highcharts/releases/tag/dashboards-v4.2.2"}, {"name": "https://github.com/highcharts/highcharts/releases/tag/grid-v3.2.0", "tags": ["x_refsource_MISC"], "url": "https://github.com/highcharts/highcharts/releases/tag/grid-v3.2.0"}], "affected": [{"vendor": "highcharts", "product": "highcharts", "versions": [{"version": "< 13.1.0", "status": "affected"}]}, {"vendor": "@highcharts", "product": "dashboards", "versions": [{"version": ">= 1.0.0, < 4.2.3", "status": "affected"}]}, {"vendor": "@highcharts", "product": "grid-pro", "versions": [{"version": ">= 2.0.0, < 3.2.0", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-10-28T17:50:59.526Z"}, "descriptions": [{"lang": "en", "value": "Highcharts JS is a JavaScript charting library based on SVG. From 1.0.0 until Dashboards 4.2.2, and from 2.0.0 until Grid Pro 3.2.0, Highcharts DataTable single-cell writers use an untrusted column ID as a key without rejecting __proto__ or constructor. DataTable.setCell, including Dashboards connector write-back and Grid Pro editing paths, can therefore write integer-indexed values onto Object.prototype or the Object constructor. In Dashboards releases with column aliases, a literal __proto__ ID is redirected by the alias map, while an alias targeting __proto__ reaches the unsafe write; later releases without aliases accept the unsafe ID directly. Those inherited values affect array and object reads and for-in enumeration throughout the page, which can alter application control flow or disrupt rendering. Exploitation requires control of the table or component column ID and a cell, point, or API write. This issue is fixed in Dashboards 4.2.2 and Grid Pro 3.2.0."}], "source": {"advisory": "GHSA-c75x-9x9h-28rm", "discovery": "UNKNOWN"}}}}

{}

{"affected": [{"affectedData": [{"product": "highcharts", "vendor": "highcharts", "versions": [{"status": "affected", "version": "< 13.1.0"}]}, {"product": "dashboards", "vendor": "@highcharts", "versions": [{"status": "affected", "version": ">= 1.0.0, < 4.2.3"}]}, {"product": "grid-pro", "vendor": "@highcharts", "versions": [{"status": "affected", "version": ">= 2.0.0, < 3.2.0"}]}], "source": "security-advisories@github.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Highcharts JS is a JavaScript charting library based on SVG. From 1.0.0 until Dashboards 4.2.2, and from 2.0.0 until Grid Pro 3.2.0, Highcharts DataTable single-cell writers use an untrusted column ID as a key without rejecting __proto__ or constructor. DataTable.setCell, including Dashboards connector write-back and Grid Pro editing paths, can therefore write integer-indexed values onto Object.prototype or the Object constructor. In Dashboards releases with column aliases, a literal __proto__ ID is redirected by the alias map, while an alias targeting __proto__ reaches the unsafe write; later releases without aliases accept the unsafe ID directly. Those inherited values affect array and object reads and for-in enumeration throughout the page, which can alter application control flow or disrupt rendering. Exploitation requires control of the table or component column ID and a cell, point, or API write. This issue is fixed in Dashboards 4.2.2 and Grid Pro 3.2.0."}], "id": "CVE-2026-118247", "lastModified": "2026-10-28T18:17:15.690", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.9, "baseSeverity": "MEDIUM", "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": "ACTIVE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:A/VC:N/VI:L/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": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-10-28T18:17:15.690", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/highcharts/highcharts/commit/02dd9349aeb6f4cc9c98806120d917ed316b4c74"}, {"source": "security-advisories@github.com", "url": "https://github.com/highcharts/highcharts/releases/tag/dashboards-v4.2.2"}, {"source": "security-advisories@github.com", "url": "https://github.com/highcharts/highcharts/releases/tag/grid-v3.2.0"}, {"source": "security-advisories@github.com", "url": "https://github.com/highcharts/highcharts/security/advisories/GHSA-c75x-9x9h-28rm"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-1321"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"created": "2026-10-28T20:00:18.303215+00:00", "updated": "2026-10-28T20:00:18.303222+00:00", "vendors": []}