{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "happy-dom",
          "vendor": "capricorn86",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 21.0.0"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "Happy DOM is a JavaScript implementation of a web browser without its graphical user interface. Prior to 21.0.0, Happy DOM loads iframe src URLs and link rel=\"stylesheet\" href URLs by default while parsing untrusted HTML on the server because disableIframePageLoading and disableCSSFileLoading default to false. An attacker who controls parsed HTML can therefore cause server-side requests to arbitrary internal or cloud endpoints without an application opt-in and may expose confidential responses or credentials returned by those endpoints. This issue is fixed in version 21.0.0."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.6,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:N/A:N",
            "version": "3.1"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-918",
              "description": "CWE-918: Server-Side Request Forgery (SSRF)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-28T20:23:10.122Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/capricorn86/happy-dom/security/advisories/GHSA-c8p4-j97h-3vg8",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/capricorn86/happy-dom/security/advisories/GHSA-c8p4-j97h-3vg8"
        },
        {
          "name": "https://github.com/capricorn86/happy-dom/pull/2502",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/capricorn86/happy-dom/pull/2502"
        },
        {
          "name": "https://github.com/capricorn86/happy-dom/commit/0a99c7525a1d0043e3182843ae33466ab7b19e74",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/capricorn86/happy-dom/commit/0a99c7525a1d0043e3182843ae33466ab7b19e74"
        },
        {
          "name": "https://github.com/capricorn86/happy-dom/releases/tag/v21.0.0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/capricorn86/happy-dom/releases/tag/v21.0.0"
        }
      ],
      "source": {
        "advisory": "GHSA-c8p4-j97h-3vg8",
        "discovery": "UNKNOWN"
      },
      "title": "Happy DOM: SSRF via iframe and link stylesheet when parsing untrusted HTML"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-118660",
    "datePublished": "2026-10-28T20:23:10.122Z",
    "dateReserved": "2026-10-28T17:25:37.561Z",
    "dateUpdated": "2026-10-28T20:23:10.122Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}