CVE-2026-48590

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An attacker who can influence a name argument (for example, an element name derived from a JSON object key or an HTTP form field name) can inject arbitrary XML markup including extra elements, comments, and event-handler attributes into the output document.</p>\n<p>This issue affects xml_builder: from 0.0.1 before 2.4.1.</p>"}, {"base64": false, "type": "text/markdown", "value": "XML Injection vulnerability in joshnuss xml_builder (`XmlBuilder` module) allows Content Spoofing, XML Injection.\n\nThis vulnerability is associated with program files `lib/xml_builder.ex` and program routines `XmlBuilder.generate/1`, `XmlBuilder.generate/2`, `XmlBuilder.element/1`, `XmlBuilder.element/2`, `XmlBuilder.element/3`.\n\nElement names, attribute names, and doctype identifiers are interpolated verbatim into the serialized XML output without validation or escaping of structural characters (`<`, `>`, `\"`, `'`, `&`). An attacker who can influence a name argument (for example, an element name derived from a JSON object key or an HTTP form field name) can inject arbitrary XML markup including extra elements, comments, and event-handler attributes into the output document.\n\nThis issue affects xml_builder: from 0.0.1 before 2.4.1."}], "value": "XML Injection vulnerability in joshnuss xml_builder (XmlBuilder module) allows Content Spoofing, XML Injection.\n\nThis vulnerability is associated with program files lib/xml_builder.ex and program routines XmlBuilder.generate/1, XmlBuilder.generate/2, XmlBuilder.element/1, XmlBuilder.element/2, XmlBuilder.element/3.\n\nElement names, attribute names, and doctype identifiers are interpolated verbatim into the serialized XML output without validation or escaping of structural characters (<, >, \", ', &). An attacker who can influence a name argument (for example, an element name derived from a JSON object key or an HTTP form field name) can inject arbitrary XML markup including extra elements, comments, and event-handler attributes into the output document.\n\nThis issue affects xml_builder: from 0.0.1 before 2.4.1."}], "impacts": [{"capecId": "CAPEC-250", "descriptions": [{"lang": "en", "value": "CAPEC-250 XML Injection"}]}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "LOCAL", "baseScore": 2.1, "baseSeverity": "LOW", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-91", "description": "CWE-91 XML Injection (aka Blind XPath Injection)", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-08-21T09:51:25.412Z"}, "references": [{"tags": ["vendor-advisory", "related"], "url": "https://github.com/joshnuss/xml_builder/security/advisories/GHSA-r82p-3q2p-728w"}, {"tags": ["related"], "url": "https://cna.erlef.org/cves/CVE-2026-48590.html"}, {"tags": ["related"], "url": "https://osv.dev/vulnerability/EEF-CVE-2026-48590"}, {"tags": ["patch"], "url": "https://github.com/joshnuss/xml_builder/commit/d5c0aec32a8eecbb440fb9bbb0f59d4d188d5859"}], "source": {"discovery": "EXTERNAL"}, "title": "Element and Attribute Names Injected Verbatim into XML Output in xml_builder"}, "adp": [{"references": [{"url": "https://github.com/joshnuss/xml_builder/security/advisories/GHSA-r82p-3q2p-728w", "tags": ["exploit"]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-21T12:24:58.189871Z", "id": "CVE-2026-48590", "options": [{"Exploitation": "poc"}, {"Automatable": "no"}, {"Technical Impact": "partial"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-08-21T12:25:33.127Z"}}]}}

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An attacker who can influence a name argument (for example, an element name derived from a JSON object key or an HTTP form field name) can inject arbitrary XML markup including extra elements, comments, and event-handler attributes into the output document.\n\nThis issue affects xml_builder: from 0.0.1 before 2.4.1.", "supportingMedia": [{"type": "text/html", "value": "<p>XML Injection vulnerability in joshnuss xml_builder (<code>XmlBuilder</code> module) allows Content Spoofing, XML Injection.</p>\n<p>This vulnerability is associated with program files <code>lib/xml_builder.ex</code> and program routines <code>XmlBuilder.generate/1</code>, <code>XmlBuilder.generate/2</code>, <code>XmlBuilder.element/1</code>, <code>XmlBuilder.element/2</code>, <code>XmlBuilder.element/3</code>.</p>\n<p>Element names, attribute names, and doctype identifiers are interpolated verbatim into the serialized XML output without validation or escaping of structural characters (<code>&lt;</code>, <code>&gt;</code>, <code>\"</code>, <code>'</code>, <code>&amp;</code>). An attacker who can influence a name argument (for example, an element name derived from a JSON object key or an HTTP form field name) can inject arbitrary XML markup including extra elements, comments, and event-handler attributes into the output document.</p>\n<p>This issue affects xml_builder: from 0.0.1 before 2.4.1.</p>", "base64": false}, {"type": "text/markdown", "value": "XML Injection vulnerability in joshnuss xml_builder (`XmlBuilder` module) allows Content Spoofing, XML Injection.\n\nThis vulnerability is associated with program files `lib/xml_builder.ex` and program routines `XmlBuilder.generate/1`, `XmlBuilder.generate/2`, `XmlBuilder.element/1`, `XmlBuilder.element/2`, `XmlBuilder.element/3`.\n\nElement names, attribute names, and doctype identifiers are interpolated verbatim into the serialized XML output without validation or escaping of structural characters (`<`, `>`, `\"`, `'`, `&`). An attacker who can influence a name argument (for example, an element name derived from a JSON object key or an HTTP form field name) can inject arbitrary XML markup including extra elements, comments, and event-handler attributes into the output document.\n\nThis issue affects xml_builder: from 0.0.1 before 2.4.1.", "base64": false}]}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-91", "description": "CWE-91 XML Injection (aka Blind XPath Injection)"}]}], "cpeApplicability": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:joshnuss:xml_builder:*:*:*:*:*:*:*:*", "vulnerable": true, "versionEndExcluding": "2.4.1", "versionStartIncluding": "0.0.1"}], "operator": "OR"}], "operator": "AND"}], "providerMetadata": {"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "shortName": "EEF", "dateUpdated": "2026-08-21T09:51:25.412Z"}}}, "cveMetadata": {"cveId": "CVE-2026-48590", "state": "PUBLISHED", "dateUpdated": "2026-08-21T12:25:33.127Z", "dateReserved": "2026-05-22T09:36:56.833Z", "assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "datePublished": "2026-08-21T09:51:25.412Z", "assignerShortName": "EEF"}, "dataVersion": "5.2"}

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An attacker who can influence a name argument (for example, an element name derived from a JSON object key or an HTTP form field name) can inject arbitrary XML markup including extra elements, comments, and event-handler attributes into the output document.\n\nThis issue affects xml_builder: from 0.0.1 before 2.4.1."}, {"lang": "es", "value": "Vulnerabilidad de inyecci\u00f3n XML en joshnuss xml_builder (m\u00f3dulo XmlBuilder) permite la suplantaci\u00f3n de contenido, inyecci\u00f3n XML.\n\nEsta vulnerabilidad est\u00e1 asociada con los archivos de programa lib/xml_builder.ex y las rutinas de programa XmlBuilder.generate/1, XmlBuilder.generate/2, XmlBuilder.element/1, XmlBuilder.element/2, XmlBuilder.element/3.\n\nLos nombres de elementos, nombres de atributos e identificadores de tipo de documento (doctype) se interpolan textualmente en la salida XML serializada sin validaci\u00f3n ni escape de caracteres estructurales (<, >, ', ', &). Un atacante que puede influir en un argumento de nombre (por ejemplo, un nombre de elemento derivado de una clave de objeto JSON o un nombre de campo de formulario HTTP) puede inyectar marcado XML arbitrario incluyendo elementos adicionales, comentarios y atributos de gestor de eventos en el documento de salida.\n\nEste problema afecta a xml_builder: desde 0.0.1 anterior a 2.4.1."}], "id": "CVE-2026-48590", "lastModified": "2026-10-16T15:10:00.103", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "attackVector": "LOCAL", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.1, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-48590", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-08-21T12:24:58.189871Z", "version": "2.0.3"}}]}, "published": "2026-08-21T10:16:38.767", "references": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://cna.erlef.org/cves/CVE-2026-48590.html"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/joshnuss/xml_builder/commit/d5c0aec32a8eecbb440fb9bbb0f59d4d188d5859"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://github.com/joshnuss/xml_builder/security/advisories/GHSA-r82p-3q2p-728w"}, {"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "url": "https://osv.dev/vulnerability/EEF-CVE-2026-48590"}, {"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "url": "https://github.com/joshnuss/xml_builder/security/advisories/GHSA-r82p-3q2p-728w"}], "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-91"}], "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "type": "Secondary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0.0.1,2.4.1)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "xml_builder", "source": "cna", "vendor": "joshnuss"}, "product": "xml_builder", "vendor": "joshnuss"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "code_commit", "value": "[9fb49131ad3ee146a4c9db9bc175bdffe32e30a0,d5c0aec32a8eecbb440fb9bbb0f59d4d188d5859)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "xml_builder", "source": "cna", "vendor": "joshnuss"}, "product": "xml_builder", "vendor": "joshnuss"}], "created": "2026-08-21T11:30:04.179322+00:00", "updated": "2026-08-21T12:07:56.866574+00:00", "vendors": ["joshnuss", "joshnuss$PRODUCT$xml_builder"]}