{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "highcharts",
          "vendor": "highcharts",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 13.1.0"
            }
          ]
        },
        {
          "product": "dashboards",
          "vendor": "@highcharts",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 1.0.0, \u003c 4.2.3"
            }
          ]
        },
        {
          "product": "grid-pro",
          "vendor": "@highcharts",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.0.0, \u003c 3.2.0"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 6.9,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "LOW",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "ACTIVE",
            "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",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "LOW"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-1321",
              "description": "CWE-1321: Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-28T17:50:59.526Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "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"
        }
      ],
      "source": {
        "advisory": "GHSA-c75x-9x9h-28rm",
        "discovery": "UNKNOWN"
      },
      "title": "Highcharts Dashboards / Grid Pro: `DataTable.setCell` and column writers treat `__proto__` as an existing column."
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-118247",
    "datePublished": "2026-10-28T17:50:59.526Z",
    "dateReserved": "2026-10-27T20:13:55.313Z",
    "dateUpdated": "2026-10-28T17:50:59.526Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}