CVE-2026-47423 (GCVE-0-2026-47423)

Vulnerability from cvelistv5 – Published: 2026-07-14 19:56 – Updated: 2026-07-14 19:56
VLAI
Title
DOMPurify XSS via `selectedcontent` re-clone
Summary
DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. In 3.4.4, DOMPurify allowed selectedcontent by default, allowing browsers to re-clone an XSS payload after sanitization so that unsanitized markup inside <selectedcontent> is returned. This issue is fixed in version 3.4.5.
Severity
8.2 (High)
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Assigner
References
Impacted products
Vendor Product Version
cure53 DOMPurify Affected: >= 3.4.4, < 3.4.5
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{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "DOMPurify",
          "vendor": "cure53",
          "versions": [
            {
              "status": "affected",
              "version": "\u003e= 3.4.4, \u003c 3.4.5"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. In 3.4.4, DOMPurify allowed selectedcontent by default, allowing browsers to re-clone an XSS payload after sanitization so that unsanitized markup inside \u003cselectedcontent\u003e is returned. This issue is fixed in version 3.4.5."
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 8.2,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N",
            "version": "3.1"
          }
        }
      ],
      "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": "2026-07-14T19:56:02.057Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/cure53/DOMPurify/security/advisories/GHSA-87xg-pxx2-7hvx",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/cure53/DOMPurify/security/advisories/GHSA-87xg-pxx2-7hvx"
        },
        {
          "name": "https://github.com/cure53/DOMPurify/commit/011b0c78f2a0f57ee54f5fcccb697a46ca6e63ea",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/cure53/DOMPurify/commit/011b0c78f2a0f57ee54f5fcccb697a46ca6e63ea"
        },
        {
          "name": "https://github.com/cure53/DOMPurify/releases/tag/3.4.5",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/cure53/DOMPurify/releases/tag/3.4.5"
        }
      ],
      "source": {
        "advisory": "GHSA-87xg-pxx2-7hvx",
        "discovery": "UNKNOWN"
      },
      "title": "DOMPurify XSS via `selectedcontent` re-clone"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-47423",
    "datePublished": "2026-07-14T19:56:02.057Z",
    "dateReserved": "2026-05-19T19:37:43.526Z",
    "dateUpdated": "2026-07-14T19:56:02.057Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-47423",
      "date": "2026-07-15",
      "epss": "0.00278",
      "percentile": "0.19687"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-47423\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-07-14T20:17:02.143\",\"lastModified\":\"2026-07-14T20:17:02.143\",\"vulnStatus\":\"Received\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"DOMPurify is a DOM-only cross-site scripting sanitizer for HTML, MathML, and SVG. In 3.4.4, DOMPurify allowed selectedcontent by default, allowing browsers to re-clone an XSS payload after sanitization so that unsanitized markup inside \u003cselectedcontent\u003e is returned. This issue is fixed in version 3.4.5.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"cure53\",\"product\":\"DOMPurify\",\"versions\":[{\"version\":\"\u003e= 3.4.4, \u003c 3.4.5\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:L/A:N\",\"baseScore\":8.2,\"baseSeverity\":\"HIGH\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"REQUIRED\",\"scope\":\"CHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.8,\"impactScore\":4.7}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-79\"}]}],\"references\":[{\"url\":\"https://github.com/cure53/DOMPurify/commit/011b0c78f2a0f57ee54f5fcccb697a46ca6e63ea\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/cure53/DOMPurify/releases/tag/3.4.5\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://github.com/cure53/DOMPurify/security/advisories/GHSA-87xg-pxx2-7hvx\",\"source\":\"security-advisories@github.com\"}]}}",
    "redhat_vex": {
      "aggregate_severity": "Important",
      "current_release_date": "2026-07-15T14:17:10+00:00",
      "cve": "CVE-2026-47423",
      "id": "CVE-2026-47423",
      "initial_release_date": "2026-07-14T19:56:02.057000+00:00",
      "product_status:fixed": "4",
      "product_status:known_not_affected": "9",
      "product_status:under_investigation": "37",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "dompurify: DOMPurify: Cross-site scripting vulnerability allows information disclosure",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-47423.json",
      "version": "3"
    }
  }
}



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