CVE-2026-34601

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A remote attacker can exploit this by inserting specific character sequences, known as the CDATA (Character Data) terminator ]]>, into a CDATASection node. When the XML is serialized, these sequences are not properly handled, allowing them to be interpreted as active XML markup. 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En las versiones 0.6.0 y anteriores de xmldom y en @xmldom/xmldom anteriores a las versiones 0.8.12 y 0.9.9, xmldom/xmldom permite que cadenas controladas por el atacante que contienen el terminador CDATA ]]> sean insertadas en un nodo CDATASection. Durante la serializaci\u00f3n, 'XMLSerializer' emit\u00eda el contenido CDATA textualmente sin rechazar o dividir de forma segura el terminador. Como resultado, los datos destinados a permanecer solo como texto se convirtieron en marcado XML activo en la salida serializada, lo que permit\u00eda la inyecci\u00f3n de estructura XML y la manipulaci\u00f3n de la l\u00f3gica de negocio posterior. Este problema ha sido parcheado en la versi\u00f3n 0.6.0 de xmldom y en las versiones 0.8.12 y 0.9.9 de @xmldom/xmldom."}], "id": "CVE-2026-34601", "lastModified": "2026-07-21T19:10:00.107", "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"}, {"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": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-34601", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-04-03T16:02:29.353065Z", "version": "2.0.3"}}]}, "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": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/security/cve/CVE-2026-34601"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2454595"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/xmldom/xmldom/security/advisories/GHSA-wh4c-j3r5-mjhp"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-34601.json"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-91"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-91"}], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}]}

{"bugzilla": {"description": "xmldom: xmldom: XML structure injection via CDATA terminator", "id": "2454595", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2454595"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "status": "draft"}, "cwe": "CWE-91", "details": ["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.", "A flaw was found in xmldom. A remote attacker can exploit this by inserting specific character sequences, known as the CDATA (Character Data) terminator ]]>, into a CDATASection node. When the XML is serialized, these sequences are not properly handled, allowing them to be interpreted as active XML markup. This vulnerability enables XML structure injection, which could lead to manipulation of the XML data and affect business logic."], "name": "CVE-2026-34601", "package_state": [{"cpe": "cpe:/a:redhat:migration_toolkit_applications:8", "fix_state": "Not affected", "package_name": "redhat-user-workloads/art-images", "product_name": "Migration Toolkit for Applications 8"}, {"cpe": "cpe:/a:redhat:podman_desktop:1", "fix_state": "Not affected", "package_name": "podman-desktop-macos-1-0", "product_name": "Red Hat Build of Podman Desktop"}, {"cpe": "cpe:/a:redhat:podman_desktop:1", "fix_state": "Not affected", "package_name": "podman-desktop-windows-1-0", "product_name": "Red Hat Build of Podman Desktop"}, {"cpe": "cpe:/a:redhat:rhdh:1", "fix_state": "Not affected", "package_name": "rhdh/rhdh-hub-rhel9", "product_name": "Red Hat Developer Hub"}, {"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Not affected", "package_name": "xmldom", "product_name": "Red Hat Fuse 7"}, {"cpe": "cpe:/a:redhat:openshift_ai", "fix_state": "Not affected", "package_name": "rhoai/odh-mlflow-rhel9", "product_name": "Red Hat OpenShift AI (RHOAI)"}, {"cpe": "cpe:/a:redhat:openshift:4", "fix_state": "Not affected", "package_name": "redhat-user-workloads/art-images", "product_name": "Red Hat OpenShift Container Platform 4"}, {"cpe": "cpe:/a:redhat:openshift_devspaces:3", "fix_state": "Not affected", "package_name": "redhat-user-workloads/code-rhel9", "product_name": "Red Hat OpenShift Dev Spaces"}, {"cpe": "cpe:/a:redhat:ansible_portal:2", "fix_state": "Not affected", "package_name": "redhat-user-workloads/ansible-plugins", "product_name": "Self-service automation portal 2"}], "public_date": "2026-04-02T17:47:13Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-34601\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-34601\nhttps://github.com/xmldom/xmldom/commit/2b852e836ab86dbbd6cbaf0537f584dd0b5ac184\nhttps://github.com/xmldom/xmldom/releases/tag/0.8.12\nhttps://github.com/xmldom/xmldom/releases/tag/0.9.9\nhttps://github.com/xmldom/xmldom/security/advisories/GHSA-wh4c-j3r5-mjhp"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.6.0]"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.8.12)"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.9.0,0.9.9)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "product": "xmldom", "vendor": "xmldom"}], "analysis": {"en": {"generated_at": "2026-04-02T22:28:39.092020+00:00", "value": {"mitigation_remediation": ["Upgrade xmldom to version 0.6.0 or later and @xmldom/xmldom to version 0.8.12 or 0.9.9 or later.", "If an immediate upgrade is not feasible, avoid using CDATA sections that contain user data; sanitize any occurrence of the string `]]>` before serialization.", "Verify that the application does not rely on unsanitized CDATA content and review code paths that serialize XML with xmldom.", "Monitor the project\u2019s advisory feed and npm registry for updated versions."], "summary": {"action": "Immediate Patch", "impact": "XML Injection"}, "threat_synthesis": {"affected_systems": "The vulnerability affects the xmldom package named xmldom:xmldom. Versions 0.6.0 and older are susceptible, as are the @xmldom/xmldom releases prior to 0.8.12 and 0.9.9. Users of these libraries in Node.js or browser environments that serialize XML content with XMLSerializer must verify whether their code relies on CDATA sections containing user data and upgrade to the patched releases.", "description_and_impact": "xmldom, a pure JavaScript implementation of the W3C XML DOM Level 2 Core, contains a flaw in its CDATASection handling. The XMLSerializer fails to escape or split an attacker\u2011controlled `]]>` terminator inserted into a CDATA section, writing the terminator verbatim and turning the intended text into active XML markup. This permits arbitrary XML structure injection, allowing an attacker to manipulate the serialized document and potentially alter application logic or data transported in the XML.", "risk_and_exploitability": "The advisory lists a CVSS score of 7.5, indicating a high risk and moderate to high impact. EPSS data is not reported and the vulnerability is not in the CISA KEV catalogue, suggesting it is not yet widely attacked. Based on the description, it is inferred that an attacker who can influence the XML content serialized by xmldom can insert a CDATA terminator and thereby cause arbitrary XML markup to be emitted. The likely attack vector is remote if the application accepts untrusted input for serialization, but the exact conditions depend on how the library is used. Successful exploitation could lead to unauthorized manipulation of XML structure and downstream application logic."}}}}, "created": "2026-04-03T08:58:03.300159+00:00", "updated": "2026-04-03T09:17:12.151815+00:00", "vendors": ["xmldom", "xmldom$PRODUCT$xmldom"]}