Vulnerability-Lookup

CVE-2026-65904 (GCVE-0-2026-65904)

Vulnerability from cvelistv5 – Published: 2026-07-23 13:16 – Updated: 2026-07-24 21:35

Title

DOMPurify through 3.3.3 Cross-Site Scripting via IN_PLACE mode

Summary

DOMPurify through 3.3.3 fails to sanitize DOM elements passed via IN_PLACE mode when the element originates from a different window/realm (e.g., an iframe's contentDocument). A cross-realm instanceof check in the private _isNode() function returns false for foreign-realm nodes, causing DOMPurify to stringify the element (yielding '[object HTMLDivElement]'), silently reset IN_PLACE to false, and return the unsanitized element unchanged with any XSS payloads intact.

Severity

2.3 (Low)


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

4.7 (Medium)


                        
                          CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N

SSVC

Exploitation: poc Automatable: no Technical Impact: partial

CISA Coordinator (v2.0.3)

CWE

CWE-754 - Improper Check for Unusual or Exceptional Conditions

Assigner

VulnCheck

References

2 references

URL	Tags
https://github.com/cure53/DOMPurify/security/advi…	vendor-advisory
https://www.vulncheck.com/advisories/dompurify-be…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
cure53	DOMPurify	Affected: 0 , ≤ 3.3.3 (semver)

Date Public

2026-04-01 00:00

Credits

fg0x0

Show details on NVD website

JSON

To clipboard

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ubuntu-cve-2026-65904

Vulnerability from osv_ubuntu

Published

2026-07-24 00:00

Modified

2026-07-24 00:00

Summary

Details

(DOMPurify through 3.3.3 fails to sanitize DOM elements passed via IN_P ...)

Severity

N/A (UNKNOWN)


                    
                      medium

References

URL

Type

	https://ubuntu.com/security/CVE-2026-65904	REPORT
	https://www.cve.org/CVERecord?id=CVE-2026-65904	REPORT
	https://github.com/cure53/DOMPurify/security/advi…	REPORT

JSON

To clipboard

{
  "affected": [
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "node-dompurify",
            "binary_version": "2.3.3+dfsg-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:22.04:LTS",
        "name": "node-dompurify",
        "purl": "pkg:deb/ubuntu/node-dompurify@2.3.3+dfsg-1?arch=source\u0026distro=jammy"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.3.0+dfsg-2",
        "2.3.3+dfsg-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "node-dompurify",
            "binary_version": "3.0.9+dfsg+~3.0.5-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:24.04:LTS",
        "name": "node-dompurify",
        "purl": "pkg:deb/ubuntu/node-dompurify@3.0.9+dfsg+~3.0.5-1?arch=source\u0026distro=noble"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "2.4.1+dfsg+~2.4.0-1",
        "3.0.9+dfsg+~3.0.5-1"
      ]
    },
    {
      "ecosystem_specific": {
        "binaries": [
          {
            "binary_name": "node-dompurify",
            "binary_version": "3.3.3+dfsg-1"
          }
        ]
      },
      "package": {
        "ecosystem": "Ubuntu:26.04:LTS",
        "name": "node-dompurify",
        "purl": "pkg:deb/ubuntu/node-dompurify@3.3.3+dfsg-1?arch=source\u0026distro=resolute"
      },
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            {
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      ],
      "versions": [
        "3.1.7+dfsg+~3.0.5-2",
        "3.3.3+dfsg-1"
      ]
    }
  ],
  "aliases": [],
  "details": "(DOMPurify through 3.3.3 fails to sanitize DOM elements passed via IN_P ...)",
  "id": "UBUNTU-CVE-2026-65904",
  "modified": "2026-07-24T00:00:00Z",
  "published": "2026-07-24T00:00:00Z",
  "references": [
    {
      "type": "REPORT",
      "url": "https://ubuntu.com/security/CVE-2026-65904"
    },
    {
      "type": "REPORT",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-65904"
    },
    {
      "type": "REPORT",
      "url": "https://github.com/cure53/DOMPurify/security/advisories/GHSA-4w3q-35jp-p934"
    }
  ],
  "related": [],
  "schema_version": "1.7.0",
  "severity": [
    {
      "score": "medium",
      "type": "Ubuntu"
    }
  ],
  "upstream": [
    "CVE-2026-65904"
  ]
}

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.

Detection rules are retrieved from Rulezet.

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.

Action not permitted

CVE-2026-65904 (GCVE-0-2026-65904)

ubuntu-cve-2026-65904

Vulnerability from osv_ubuntu

Tags

Sightings

Nomenclature