CVE-2026-47079

{"id": "CVE-2026-47079", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-47079", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "no"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-08-21T12:17:52.012230Z"}}], "cvssMetricV40": [{"type": "Secondary", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "cvssData": {"Safety": "NOT_DEFINED", "version": "4.0", "Recovery": "NOT_DEFINED", "baseScore": 2.1, "Automatable": "NOT_DEFINED", "attackVector": "LOCAL", "baseSeverity": "LOW", "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", "exploitMaturity": "NOT_DEFINED", "providerUrgency": "NOT_DEFINED", "userInteraction": "NONE", "attackComplexity": "LOW", "attackRequirements": "PRESENT", "privilegesRequired": "NONE", "subIntegrityImpact": "LOW", "vulnIntegrityImpact": "NONE", "integrityRequirement": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "availabilityRequirement": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "subConfidentialityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "confidentialityRequirement": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "vulnerabilityResponseEffort": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED"}}]}, "affected": [{"source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "affectedData": [{"cpes": ["cpe:2.3:a:joshnuss:xml_builder:*:*:*:*:*:*:*:*"], "repo": "https://github.com/joshnuss/xml_builder", "vendor": "joshnuss", "modules": ["'Elixir.XmlBuilder'"], "product": "xml_builder", "versions": [{"status": "affected", "version": "0.0.6", "lessThan": "2.4.1", "versionType": "semver"}], "packageURL": "pkg:hex/xml_builder", "packageName": "xml_builder", "programFiles": ["lib/xml_builder.ex"], "collectionURL": "https://repo.hex.pm", "defaultStatus": "unaffected", "programRoutines": [{"name": "'Elixir.XmlBuilder':generate/1"}, {"name": "'Elixir.XmlBuilder':generate/2"}, {"name": "'Elixir.XmlBuilder':escape_string/1"}, {"name": "'Elixir.XmlBuilder':escape_entity/1"}]}, {"cpes": ["cpe:2.3:a:joshnuss:xml_builder:*:*:*:*:*:*:*:*"], "repo": "https://github.com/joshnuss/xml_builder", "vendor": "joshnuss", "modules": ["'Elixir.XmlBuilder'"], "product": "xml_builder", "versions": [{"status": "affected", "version": "aae31e6e8ac837bcbb8afb816c0d14324b5cfe2b", "lessThan": "c3390e2046ec297b3bb8c30d5779cdfd6508c275", "versionType": "git"}], "packageURL": "pkg:github/joshnuss/xml_builder", "packageName": "joshnuss/xml_builder", "programFiles": ["lib/xml_builder.ex"], "collectionURL": "https://github.com", "defaultStatus": "unaffected", "programRoutines": [{"name": "'Elixir.XmlBuilder':generate/1"}, {"name": "'Elixir.XmlBuilder':generate/2"}, {"name": "'Elixir.XmlBuilder':escape_string/1"}, {"name": "'Elixir.XmlBuilder':escape_entity/1"}]}]}], "published": "2026-08-21T10:16:38.167", "references": [{"url": "https://cna.erlef.org/cves/CVE-2026-47079.html", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://github.com/joshnuss/xml_builder/commit/c3390e2046ec297b3bb8c30d5779cdfd6508c275", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://github.com/joshnuss/xml_builder/security/advisories/GHSA-5hjx-8g53-cmvm", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://osv.dev/vulnerability/EEF-CVE-2026-47079", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}, {"url": "https://github.com/joshnuss/xml_builder/security/advisories/GHSA-5hjx-8g53-cmvm", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db", "description": [{"lang": "en", "value": "CWE-838"}]}], "descriptions": [{"lang": "en", "value": "Inappropriate Encoding for Output Context vulnerability in joshnuss xml_builder (XmlBuilder module) allows Content Spoofing, Cross-site Scripting.\n\nThis vulnerability is associated with program files lib/xml_builder.ex and program routines XmlBuilder.generate/1, XmlBuilder.generate/2, XmlBuilder.escape_string/1, XmlBuilder.escape_entity/1.\n\nXmlBuilder.generate/1 does not escape literal & characters in text or attribute values when they are followed by an entity-like token (lt;, gt;, amp;, quot;, apos;). As a result, attacker-supplied input such as &lt;script&gt; is emitted verbatim into the serialized XML rather than being escaped to &amp;lt;script&amp;gt;. When a downstream XML parser later reads the document, it decodes the entity sequences into the literal characters <script>, promoting inert-looking text into real markup. This allows an attacker to bypass upstream filters that block raw < and > characters, injecting markup into any downstream consumer that parses the produced XML and renders the text content in a markup-sensitive context (HTML, SVG, RSS/Atom feeds). Both element text and attribute values are affected.\n\nThis issue affects xml_builder: from 0.0.6 before 2.4.1."}, {"lang": "es", "value": "Vulnerabilidad de codificaci\u00f3n inapropiada para el contexto de salida en joshnuss xml_builder (m\u00f3dulo XmlBuilder) permite la suplantaci\u00f3n de contenido (Content Spoofing), cross-site scripting.\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.escape_string/1, XmlBuilder.escape_entity/1.\n\nXmlBuilder.generate/1 no escapa los caracteres literales & en texto o valores de atributos cuando van seguidos de un token similar a una entidad (lt;, gt;, amp;, quot;, apos;). Como resultado, la entrada proporcionada por el atacante, como <script>, se emite textualmente en el XML serializado en lugar de ser escapada a <script>. Cuando un analizador XML descendente lee el documento m\u00e1s tarde, decodifica las secuencias de entidades en los caracteres literales <script>, promoviendo texto de apariencia inerte a marcado real. Esto permite a un atacante eludir filtros ascendentes que bloquean los caracteres brutos < y >, inyectando marcado en cualquier consumidor descendente que analiza el XML producido y renderiza el contenido de texto en un contexto sensible al marcado (HTML, SVG, RSS/Atom feeds). Tanto el texto de los elementos como los valores de los atributos se ven afectados.\n\nEste problema afecta a xml_builder: desde 0.0.6 antes de 2.4.1."}], "lastModified": "2026-10-16T15:10:00.103", "sourceIdentifier": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"}