{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-118248",
        "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "state": "PUBLISHED",
        "assignerShortName": "GitHub_M",
        "dateReserved": "2026-10-27T20:13:55.313Z",
        "datePublished": "2026-10-28T17:55:47.520Z",
        "dateUpdated": "2026-10-28T17:55:47.520Z"
    },
    "containers": {
        "cna": {
            "title": "Highcharts Dashboards: editableOptions.propertyPath 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": "ACTIVE",
                        "vulnConfidentialityImpact": "NONE",
                        "vulnIntegrityImpact": "HIGH",
                        "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:H/VA:H/SC:L/SI:L/SA:L",
                        "version": "4.0"
                    }
                }
            ],
            "references": [
                {
                    "name": "https://github.com/highcharts/highcharts/security/advisories/GHSA-wg5j-9wp8-2ggm",
                    "tags": [
                        "x_refsource_CONFIRM"
                    ],
                    "url": "https://github.com/highcharts/highcharts/security/advisories/GHSA-wg5j-9wp8-2ggm"
                },
                {
                    "name": "https://github.com/highcharts/highcharts/commit/05efb9849130461fe61992ea8f58d22edaad978b",
                    "tags": [
                        "x_refsource_MISC"
                    ],
                    "url": "https://github.com/highcharts/highcharts/commit/05efb9849130461fe61992ea8f58d22edaad978b"
                },
                {
                    "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"
                }
            ],
            "affected": [
                {
                    "vendor": "highcharts",
                    "product": "highcharts",
                    "versions": [
                        {
                            "version": "< 13.1.0",
                            "status": "affected"
                        }
                    ]
                },
                {
                    "vendor": "@highcharts",
                    "product": "dashboards",
                    "versions": [
                        {
                            "version": ">= 1.0.0, < 4.2.2",
                            "status": "affected"
                        }
                    ]
                }
            ],
            "providerMetadata": {
                "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
                "shortName": "GitHub_M",
                "dateUpdated": "2026-10-28T17:55:47.520Z"
            },
            "descriptions": [
                {
                    "lang": "en",
                    "value": "Highcharts JS is a JavaScript charting library based on SVG. From 1.0.0 until 4.2.2, Highcharts Dashboards edit mode walks editableOptions propertyPath segments without rejecting prototype-related keys. An attacker who controls editableOptions can provide a path through __proto__ or constructor, and a user's edit writes the configured value onto Object.prototype. The property then becomes visible to JavaScript throughout the page, with consequences determined by the consuming application. This issue is fixed in 4.2.2."
                }
            ],
            "source": {
                "advisory": "GHSA-wg5j-9wp8-2ggm",
                "discovery": "UNKNOWN"
            }
        }
    }
}