FKIE_CVE-2026-34601

Vulnerability from fkie_nvd - Published: 2026-04-02 18:16 - Updated: 2026-04-03 16:16
Severity ?
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Summary
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) `DOMParser` and `XMLSerializer` module. In xmldom versions 0.6.0 and prior and @xmldom/xmldom prior to versions 0.8.12 and 0.9.9, xmldom/xmldom allows attacker-controlled strings containing the CDATA terminator ]]> to be inserted into a CDATASection node. During serialization, XMLSerializer emitted the CDATA content verbatim without rejecting or safely splitting the terminator. As a result, data intended to remain text-only became active XML markup in the serialized output, enabling XML structure injection and downstream business-logic manipulation. This issue has been patched in xmldom version 0.6.0 and @xmldom/xmldom versions 0.8.12 and 0.9.9.
References
security-advisories@github.comhttps://github.com/xmldom/xmldom/commit/2b852e836ab86dbbd6cbaf0537f584dd0b5ac184
security-advisories@github.comhttps://github.com/xmldom/xmldom/releases/tag/0.8.12
security-advisories@github.comhttps://github.com/xmldom/xmldom/releases/tag/0.9.9
security-advisories@github.comhttps://github.com/xmldom/xmldom/security/advisories/GHSA-wh4c-j3r5-mjhp
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/xmldom/xmldom/security/advisories/GHSA-wh4c-j3r5-mjhp
Impacted products
Vendor Product Version
To clipboard 

{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) `DOMParser` and `XMLSerializer` module. In xmldom versions 0.6.0 and prior and @xmldom/xmldom prior to versions 0.8.12 and 0.9.9, xmldom/xmldom allows attacker-controlled strings containing the CDATA terminator ]]\u003e to be inserted into a CDATASection node. During serialization, XMLSerializer emitted the CDATA content verbatim without rejecting or safely splitting the terminator. As a result, data intended to remain text-only became active XML markup in the serialized output, enabling XML structure injection and downstream business-logic manipulation. This issue has been patched in xmldom version 0.6.0 and @xmldom/xmldom versions 0.8.12 and 0.9.9."
    }
  ],
  "id": "CVE-2026-34601",
  "lastModified": "2026-04-03T16:16:40.603",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "NONE",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-04-02T18:16:31.933",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/xmldom/xmldom/commit/2b852e836ab86dbbd6cbaf0537f584dd0b5ac184"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/xmldom/xmldom/releases/tag/0.8.12"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/xmldom/xmldom/releases/tag/0.9.9"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/xmldom/xmldom/security/advisories/GHSA-wh4c-j3r5-mjhp"
    },
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "url": "https://github.com/xmldom/xmldom/security/advisories/GHSA-wh4c-j3r5-mjhp"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Undergoing Analysis",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-91"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}


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