Vulnerability-Lookup

CVE-2026-118242 (GCVE-0-2026-118242)

Vulnerability from cvelistv5 – Published: 2026-10-28 17:30 – Updated: 2026-10-28 17:30

Title

Highcharts Grid: custom icon definition objects written with raw `setAttribute` on `<path>`

Summary

Highcharts JS is a JavaScript charting library based on SVG. From 2.3.0 until 3.2.0, Highcharts Grid creates SVG path elements from rendering.icons object definitions and previously copied every child key with setAttribute. An attacker who controls Grid configuration can supply event-handler attribute names in an icon definition. Because custom icons override built-ins, the attacker can replace default sort or pagination icons, and script runs in the hosting page origin when a user hovers over or activates the affected icon. This issue is fixed in 3.2.0.

Severity

8.5 (High)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N

CWE

CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Assigner

GitHub_M CNA under the mitre root

CNA scorecard C 72/100 over 7994 records in the last 180 days details

References

2 references

URL	Tags
https://github.com/highcharts/highcharts/security…	x_refsource_CONFIRM
https://github.com/highcharts/highcharts/commit/8…	x_refsource_MISC

Impacted products

3 products

Vendor	Product	Version	CPE status
highcharts	highcharts	Affected: < 13.1.0	guessed
@highcharts	grid-lite	Affected: >= 2.3.0, < 3.2.0	guessed
@highcharts	grid-pro	Affected: >= 2.3.0, < 3.2.0	guessed

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "highcharts",
          "vendor": "highcharts",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 13.1.0"
            }
          ]
        },
        {
          "product": "grid-lite",
          "vendor": "@highcharts",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.3.0, \u003c 3.2.0"
            }
          ]
        },
        {
          "product": "grid-pro",
          "vendor": "@highcharts",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 2.3.0, \u003c 3.2.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Highcharts JS is a JavaScript charting library based on SVG. From 2.3.0 until 3.2.0, Highcharts Grid creates SVG path elements from rendering.icons object definitions and previously copied every child key with setAttribute. An attacker who controls Grid configuration can supply event-handler attribute names in an icon definition. Because custom icons override built-ins, the attacker can replace default sort or pagination icons, and script runs in the hosting page origin when a user hovers over or activates the affected icon. This issue is fixed in 3.2.0."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 8.5,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "LOW",
            "subIntegrityImpact": "LOW",
            "userInteraction": "PASSIVE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-79",
              "description": "CWE-79: Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-28T17:30:55.383Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/highcharts/highcharts/security/advisories/GHSA-6g3c-p4fg-xv47",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/highcharts/highcharts/security/advisories/GHSA-6g3c-p4fg-xv47"
        },
        {
          "name": "https://github.com/highcharts/highcharts/commit/8fc970658fee6601625b42da29d27c3ef7c45e30",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/highcharts/highcharts/commit/8fc970658fee6601625b42da29d27c3ef7c45e30"
        }
      ],
      "source": {
        "advisory": "GHSA-6g3c-p4fg-xv47",
        "discovery": "UNKNOWN"
      },
      "title": "Highcharts Grid: custom icon definition objects written with raw `setAttribute` on `\u003cpath\u003e`"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-118242",
    "datePublished": "2026-10-28T17:30:55.383Z",
    "dateReserved": "2026-10-27T20:13:55.312Z",
    "dateUpdated": "2026-10-28T17:30:55.383Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-118242",
      "date": "2026-10-29",
      "epss": "0.00305",
      "percentile": "0.23247"
    },
    "nvd": {
      "cve": {
        "affected": [
          {
            "affectedData": [
              {
                "product": "highcharts",
                "vendor": "highcharts",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003c 13.1.0"
                  }
                ]
              },
              {
                "product": "grid-lite",
                "vendor": "@highcharts",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003e= 2.3.0, \u003c 3.2.0"
                  }
                ]
              },
              {
                "product": "grid-pro",
                "vendor": "@highcharts",
                "versions": [
                  {
                    "status": "affected",
                    "version": "\u003e= 2.3.0, \u003c 3.2.0"
                  }
                ]
              }
            ],
            "source": "security-advisories@github.com"
          }
        ],
        "cveTags": [],
        "descriptions": [
          {
            "lang": "en",
            "value": "Highcharts JS is a JavaScript charting library based on SVG. From 2.3.0 until 3.2.0, Highcharts Grid creates SVG path elements from rendering.icons object definitions and previously copied every child key with setAttribute. An attacker who controls Grid configuration can supply event-handler attribute names in an icon definition. Because custom icons override built-ins, the attacker can replace default sort or pagination icons, and script runs in the hosting page origin when a user hovers over or activates the affected icon. This issue is fixed in 3.2.0."
          }
        ],
        "id": "CVE-2026-118242",
        "lastModified": "2026-10-29T15:08:43.210",
        "metrics": {
          "cvssMetricV40": [
            {
              "cvssData": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
                "attackComplexity": "LOW",
                "attackRequirements": "NONE",
                "attackVector": "NETWORK",
                "availabilityRequirement": "NOT_DEFINED",
                "baseScore": 8.5,
                "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": "NONE",
                "subConfidentialityImpact": "LOW",
                "subIntegrityImpact": "LOW",
                "userInteraction": "PASSIVE",
                "valueDensity": "NOT_DEFINED",
                "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N/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": "NONE",
                "vulnConfidentialityImpact": "HIGH",
                "vulnIntegrityImpact": "HIGH",
                "vulnerabilityResponseEffort": "NOT_DEFINED"
              },
              "source": "security-advisories@github.com",
              "type": "Secondary"
            }
          ]
        },
        "published": "2026-10-28T18:17:14.963",
        "references": [
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/highcharts/highcharts/commit/8fc970658fee6601625b42da29d27c3ef7c45e30"
          },
          {
            "source": "security-advisories@github.com",
            "url": "https://github.com/highcharts/highcharts/security/advisories/GHSA-6g3c-p4fg-xv47"
          }
        ],
        "sourceIdentifier": "security-advisories@github.com",
        "vulnStatus": "Awaiting Analysis",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-79"
              }
            ],
            "source": "security-advisories@github.com",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-10-30T00:29:28+00:00",
      "cve": "CVE-2026-118242",
      "id": "CVE-2026-118242",
      "initial_release_date": "2026-10-28T17:30:55.383000+00:00",
      "product_status:known_affected": "54",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "highcharts: highcharts: Cross-site scripting via unsanitized grid icon attributes",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-118242.json",
      "version": "3"
    }
  }
}

GHSA-6G3C-P4FG-XV47

Vulnerability from github – Published: 2026-10-28 19:55 – Updated: 2026-10-28 19:55

Summary

Highcharts Grid: custom icon definition objects written with raw `setAttribute` on `<path>`

Details

Impact

A custom icon supplied under rendering.icons as an icon definition object is built by creating an SVG path for each of its child entries and setting every key of that entry as an attribute of the path, without filtering the attribute names; only the string form of the option is passed through the markup allow-list. An attacker who controls the Grid configuration can therefore supply child entries whose keys name event handlers, and those handlers execute in the origin of the page hosting the Grid. Custom icons take precedence over the built-in ones, so the attacker can replace icons that render without any further configuration, such as the sort icon shown in every column header by default and the pagination controls where pagination is enabled, and does not need any reference to a custom icon name. Exploitation requires that untrusted data reach the Grid configuration and that a user hover over or activate an affected icon.

Workarounds

If your Grid configuration comes from a source you do not fully control, paste this snippet right after importing the Grid module:

(function () {
    const GridNS = typeof Grid !== 'undefined' ? Grid : undefined;
    const GridClass = GridNS && GridNS.Grid;

    if (!GridClass || !GridClass.prototype.loadUserOptions) {
        return; // Grid not loaded
    }

    const allowedPathAttributes = [
        'd',
        'fill',
        'opacity',
        'stroke',
        'stroke-width',
        'stroke-linecap',
        'stroke-linejoin',
        'transform'
    ];

    const originalLoadUserOptions = GridClass.prototype.loadUserOptions;

    function sanitizeIconValue(value) {
        if (!value || typeof value === 'string') {
            return value;
        }

        const children = value.children || [];
        const sanitizedChildren = [];

        for (let i = 0; i < children.length; i++) {
            const child = children[i] || {};
            const clean = {};

            for (let j = 0; j < allowedPathAttributes.length; j++) {
                const attr = allowedPathAttributes[j];
                if (child[attr] !== undefined && child[attr] !== null) {
                    clean[attr] = child[attr];
                }
            }

            sanitizedChildren.push(clean);
        }

        return {
            width: value.width,
            height: value.height,
            viewBox: value.viewBox,
            fill: value.fill,
            children: sanitizedChildren
        };
    }

    function sanitizeIconsMap(icons) {
        if (!icons) {
            return icons;
        }

        const out = {};
        for (const key in icons) {
            if (Object.prototype.hasOwnProperty.call(icons, key)) {
                out[key] = sanitizeIconValue(icons[key]);
            }
        }
        return out;
    }

    GridClass.prototype.loadUserOptions = function (newOptions) {
        if (
            newOptions &&
            newOptions.rendering &&
            newOptions.rendering.icons
        ) {
            newOptions.rendering.icons = sanitizeIconsMap(
                newOptions.rendering.icons
            );
        }

        return originalLoadUserOptions.apply(this, arguments);
    };
}());

Obtaining the patched version

The patched releases are available from all the usual distribution channels. With npm, upgrade the affected package to the patched version listed above, for example npm install @highcharts/grid-lite@3.2.0. If you load Highcharts Grid from a CDN, use a versioned URL, for example https://cdn.jsdelivr.net/npm/@highcharts/grid-lite@3.2.0/grid-lite.js. For more on each installation method, see the installation guide.

Severity

8.5 (High)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N

Show details on source website

JSON

To clipboard

{
  "affected": [
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.1.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@highcharts/grid-lite"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.3.0"
            },
            {
              "fixed": "3.2.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "database_specific": {
        "last_known_affected_version_range": "\u003c= 3.1.0"
      },
      "package": {
        "ecosystem": "npm",
        "name": "@highcharts/grid-pro"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "2.3.0"
            },
            {
              "fixed": "3.2.0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-118242"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-79"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2026-10-28T19:55:46Z",
    "nvd_published_at": "2026-10-28T18:17:14Z",
    "severity": "HIGH"
  },
  "details": "### Impact\nA custom icon supplied under `rendering.icons` as an icon definition object is built by creating an SVG path for each of its child entries and setting every key of that entry as an attribute of the path, without filtering the attribute names; only the string form of the option is passed through the markup allow-list. An attacker who controls the Grid configuration can therefore supply child entries whose keys name event handlers, and those handlers execute in the origin of the page hosting the Grid. Custom icons take precedence over the built-in ones, so the attacker can replace icons that render without any further configuration, such as the sort icon shown in every column header by default and the pagination controls where pagination is enabled, and does not need any reference to a custom icon name. Exploitation requires that untrusted data reach the Grid configuration and that a user hover over or activate an affected icon.\n\n### Workarounds\nIf your Grid configuration comes from a source you do not fully control, paste this snippet right after importing the Grid module:\n\n```ts\n(function () {\n    const GridNS = typeof Grid !== \u0027undefined\u0027 ? Grid : undefined;\n    const GridClass = GridNS \u0026\u0026 GridNS.Grid;\n\n    if (!GridClass || !GridClass.prototype.loadUserOptions) {\n        return; // Grid not loaded\n    }\n\n    const allowedPathAttributes = [\n        \u0027d\u0027,\n        \u0027fill\u0027,\n        \u0027opacity\u0027,\n        \u0027stroke\u0027,\n        \u0027stroke-width\u0027,\n        \u0027stroke-linecap\u0027,\n        \u0027stroke-linejoin\u0027,\n        \u0027transform\u0027\n    ];\n\n    const originalLoadUserOptions = GridClass.prototype.loadUserOptions;\n\n    function sanitizeIconValue(value) {\n        if (!value || typeof value === \u0027string\u0027) {\n            return value;\n        }\n\n        const children = value.children || [];\n        const sanitizedChildren = [];\n\n        for (let i = 0; i \u003c children.length; i++) {\n            const child = children[i] || {};\n            const clean = {};\n\n            for (let j = 0; j \u003c allowedPathAttributes.length; j++) {\n                const attr = allowedPathAttributes[j];\n                if (child[attr] !== undefined \u0026\u0026 child[attr] !== null) {\n                    clean[attr] = child[attr];\n                }\n            }\n\n            sanitizedChildren.push(clean);\n        }\n\n        return {\n            width: value.width,\n            height: value.height,\n            viewBox: value.viewBox,\n            fill: value.fill,\n            children: sanitizedChildren\n        };\n    }\n\n    function sanitizeIconsMap(icons) {\n        if (!icons) {\n            return icons;\n        }\n\n        const out = {};\n        for (const key in icons) {\n            if (Object.prototype.hasOwnProperty.call(icons, key)) {\n                out[key] = sanitizeIconValue(icons[key]);\n            }\n        }\n        return out;\n    }\n\n    GridClass.prototype.loadUserOptions = function (newOptions) {\n        if (\n            newOptions \u0026\u0026\n            newOptions.rendering \u0026\u0026\n            newOptions.rendering.icons\n        ) {\n            newOptions.rendering.icons = sanitizeIconsMap(\n                newOptions.rendering.icons\n            );\n        }\n\n        return originalLoadUserOptions.apply(this, arguments);\n    };\n}());\n```\n\n### Obtaining the patched version\nThe patched releases are available from all the usual distribution channels. With npm, upgrade the affected package to the patched version listed above, for example `npm install @highcharts/grid-lite@3.2.0`. If you load Highcharts Grid from a CDN, use a versioned URL, for example `https://cdn.jsdelivr.net/npm/@highcharts/grid-lite@3.2.0/grid-lite.js`. For more on each installation method, see the [installation guide](https://www.highcharts.com/docs/grid/installation).",
  "id": "GHSA-6g3c-p4fg-xv47",
  "modified": "2026-10-28T19:55:46Z",
  "published": "2026-10-28T19:55:46Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/highcharts/highcharts/security/advisories/GHSA-6g3c-p4fg-xv47"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-118242"
    },
    {
      "type": "WEB",
      "url": "https://github.com/highcharts/highcharts/commit/8fc970658fee6601625b42da29d27c3ef7c45e30"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/highcharts/highcharts"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:N/SC:L/SI:L/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Highcharts Grid: custom icon definition objects written with raw `setAttribute` on `\u003cpath\u003e`"
}

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Vulnerability timeline

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The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

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