CVE-2026-47080 (GCVE-0-2026-47080)
Vulnerability from cvelistv5
Published
2026-08-21 09:49
Modified
2026-08-21 12:32
Severity ?
VLAI Severity ?
EPSS score ?
CWE
- CWE-91 - XML Injection (aka Blind XPath Injection)
Summary
XML Injection vulnerability in joshnuss xml_builder (XmlBuilder module) allows Content Spoofing, XML Injection.
This vulnerability is associated with program files lib/xml_builder.ex and program routines XmlBuilder.generate/1, XmlBuilder.generate/2, XmlBuilder.escape/1.
The escape/1 clause for {:cdata, data} in lib/xml_builder.ex concatenates data verbatim between the CDATA opener <![CDATA[ and closer ]]> without rewriting or splitting on the embedded ]]> sequence. Because CDATA sections have no internal escape mechanism, the only safe way to embed arbitrary bytes is to split on ]]> and emit adjacent CDATA sections. An attacker who can supply input containing ]]> closes the CDATA section early; any bytes that follow are parsed as ordinary XML markup by downstream consumers, allowing injection of arbitrary elements, text, or entity references into the output document.
This issue affects xml_builder: from 0.0.7 before 2.4.1.
References
Impacted products
| Vendor | Product | Version | |||||||
|---|---|---|---|---|---|---|---|---|---|
| joshnuss | xml_builder |
Version: 0.0.7 ≤ cpe:2.3:a:joshnuss:xml_builder:*:*:*:*:*:*:*:* |
|||||||
|
|||||||||
{
"containers": {
"adp": [
{
"metrics": [
{
"other": {
"content": {
"id": "CVE-2026-47080",
"options": [
{
"Exploitation": "poc"
},
{
"Automatable": "no"
},
{
"Technical Impact": "partial"
}
],
"role": "CISA Coordinator",
"timestamp": "2026-08-21T12:30:05.428465Z",
"version": "2.0.3"
},
"type": "ssvc"
}
}
],
"providerMetadata": {
"dateUpdated": "2026-08-21T12:32:15.846Z",
"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
"shortName": "CISA-ADP"
},
"references": [
{
"tags": [
"exploit"
],
"url": "https://vincent.vulcoord.net/score/?state=Not+Scored\u0026year=2026\u0026year=2025\u0026assigned_to=88bc49d9-8ddd-4227-affc-a613e67abc4d\u0026ordering=-published\u0026cve=CVE-2026-47080"
}
],
"title": "CISA ADP Vulnrichment"
}
],
"cna": {
"affected": [
{
"collectionURL": "https://repo.hex.pm",
"cpes": [
"cpe:2.3:a:joshnuss:xml_builder:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.XmlBuilder\u0027"
],
"packageName": "xml_builder",
"packageURL": "pkg:hex/xml_builder",
"product": "xml_builder",
"programFiles": [
"lib/xml_builder.ex"
],
"programRoutines": [
{
"name": "\u0027Elixir.XmlBuilder\u0027:generate/1"
},
{
"name": "\u0027Elixir.XmlBuilder\u0027:generate/2"
},
{
"name": "\u0027Elixir.XmlBuilder\u0027:escape/1"
}
],
"repo": "https://github.com/joshnuss/xml_builder",
"vendor": "joshnuss",
"versions": [
{
"lessThan": "2.4.1",
"status": "affected",
"version": "0.0.7",
"versionType": "semver"
}
]
},
{
"collectionURL": "https://github.com",
"cpes": [
"cpe:2.3:a:joshnuss:xml_builder:*:*:*:*:*:*:*:*"
],
"defaultStatus": "unaffected",
"modules": [
"\u0027Elixir.XmlBuilder\u0027"
],
"packageName": "joshnuss/xml_builder",
"packageURL": "pkg:github/joshnuss/xml_builder",
"product": "xml_builder",
"programFiles": [
"lib/xml_builder.ex"
],
"programRoutines": [
{
"name": "\u0027Elixir.XmlBuilder\u0027:generate/1"
},
{
"name": "\u0027Elixir.XmlBuilder\u0027:generate/2"
},
{
"name": "\u0027Elixir.XmlBuilder\u0027:escape/1"
}
],
"repo": "https://github.com/joshnuss/xml_builder",
"vendor": "joshnuss",
"versions": [
{
"lessThan": "bfb1ada071ccc1e384c30f782197ca5154106706",
"status": "affected",
"version": "26766f884ed19adee1563522c7afb5f056a6f3b5",
"versionType": "git"
}
]
}
],
"cpeApplicability": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:joshnuss:xml_builder:*:*:*:*:*:*:*:*",
"versionEndExcluding": "2.4.1",
"versionStartIncluding": "0.0.7",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
],
"operator": "AND"
}
],
"credits": [
{
"lang": "en",
"type": "finder",
"value": "Peter Ullrich"
},
{
"lang": "en",
"type": "remediation developer",
"value": "Joshua Nussbaum"
},
{
"lang": "en",
"type": "coordinator",
"value": "Jonatan M\u00e4nnchen / EEF"
}
],
"descriptions": [
{
"lang": "en",
"supportingMedia": [
{
"base64": false,
"type": "text/html",
"value": "\u003cp\u003eXML Injection vulnerability in joshnuss xml_builder (\u003ccode\u003eXmlBuilder\u003c/code\u003e module) allows Content Spoofing, XML Injection.\u003c/p\u003e\n\u003cp\u003eThis vulnerability is associated with program files \u003ccode\u003elib/xml_builder.ex\u003c/code\u003e and program routines \u003ccode\u003eXmlBuilder.generate/1\u003c/code\u003e, \u003ccode\u003eXmlBuilder.generate/2\u003c/code\u003e, \u003ccode\u003eXmlBuilder.escape/1\u003c/code\u003e.\u003c/p\u003e\n\u003cp\u003eThe \u003ccode\u003eescape/1\u003c/code\u003e clause for \u003ccode\u003e{:cdata, data}\u003c/code\u003e in \u003ccode\u003elib/xml_builder.ex\u003c/code\u003e concatenates data verbatim between the CDATA opener \u003ccode\u003e\u0026lt;![CDATA[\u003c/code\u003e and closer \u003ccode\u003e]]\u0026gt;\u003c/code\u003e without rewriting or splitting on the embedded \u003ccode\u003e]]\u0026gt;\u003c/code\u003e sequence. Because CDATA sections have no internal escape mechanism, the only safe way to embed arbitrary bytes is to split on \u003ccode\u003e]]\u0026gt;\u003c/code\u003e and emit adjacent CDATA sections. An attacker who can supply input containing \u003ccode\u003e]]\u0026gt;\u003c/code\u003e closes the CDATA section early; any bytes that follow are parsed as ordinary XML markup by downstream consumers, allowing injection of arbitrary elements, text, or entity references into the output document.\u003c/p\u003e\n\u003cp\u003eThis issue affects xml_builder: from 0.0.7 before 2.4.1.\u003c/p\u003e"
},
{
"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.escape/1`.\n\nThe `escape/1` clause for `{:cdata, data}` in `lib/xml_builder.ex` concatenates data verbatim between the CDATA opener `\u003c![CDATA[` and closer `]]\u003e` without rewriting or splitting on the embedded `]]\u003e` sequence. Because CDATA sections have no internal escape mechanism, the only safe way to embed arbitrary bytes is to split on `]]\u003e` and emit adjacent CDATA sections. An attacker who can supply input containing `]]\u003e` closes the CDATA section early; any bytes that follow are parsed as ordinary XML markup by downstream consumers, allowing injection of arbitrary elements, text, or entity references into the output document.\n\nThis issue affects xml_builder: from 0.0.7 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.escape/1.\n\nThe escape/1 clause for {:cdata, data} in lib/xml_builder.ex concatenates data verbatim between the CDATA opener \u003c![CDATA[ and closer ]]\u003e without rewriting or splitting on the embedded ]]\u003e sequence. Because CDATA sections have no internal escape mechanism, the only safe way to embed arbitrary bytes is to split on ]]\u003e and emit adjacent CDATA sections. An attacker who can supply input containing ]]\u003e closes the CDATA section early; any bytes that follow are parsed as ordinary XML markup by downstream consumers, allowing injection of arbitrary elements, text, or entity references into the output document.\n\nThis issue affects xml_builder: from 0.0.7 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": {
"dateUpdated": "2026-08-21T09:49:34.772Z",
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"shortName": "EEF"
},
"references": [
{
"tags": [
"vendor-advisory",
"related"
],
"url": "https://github.com/joshnuss/xml_builder/security/advisories/GHSA-67r9-hmxw-h595"
},
{
"tags": [
"related"
],
"url": "https://cna.erlef.org/cves/CVE-2026-47080.html"
},
{
"tags": [
"related"
],
"url": "https://osv.dev/vulnerability/EEF-CVE-2026-47080"
},
{
"tags": [
"patch"
],
"url": "https://github.com/joshnuss/xml_builder/commit/bfb1ada071ccc1e384c30f782197ca5154106706"
}
],
"source": {
"discovery": "EXTERNAL"
},
"title": "CDATA Section Breakout via Unsanitised ]]\u003e in xml_builder"
}
},
"cveMetadata": {
"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"assignerShortName": "EEF",
"cveId": "CVE-2026-47080",
"datePublished": "2026-08-21T09:49:34.772Z",
"dateReserved": "2026-05-18T17:28:10.319Z",
"dateUpdated": "2026-08-21T12:32:15.846Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.2",
"vulnerability-lookup:meta": {
"vulnrichment": {
"containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-47080\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"poc\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-08-21T12:30:05.428465Z\"}}}], \"references\": [{\"url\": \"https://vincent.vulcoord.net/score/?state=Not+Scored\u0026year=2026\u0026year=2025\u0026assigned_to=88bc49d9-8ddd-4227-affc-a613e67abc4d\u0026ordering=-published\u0026cve=CVE-2026-47080\", \"tags\": [\"exploit\"]}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-08-21T12:30:21.762Z\"}}], \"cna\": {\"title\": \"CDATA Section Breakout via Unsanitised ]]\u003e in xml_builder\", \"source\": {\"discovery\": \"EXTERNAL\"}, \"credits\": [{\"lang\": \"en\", \"type\": \"finder\", \"value\": \"Peter Ullrich\"}, {\"lang\": \"en\", \"type\": \"remediation developer\", \"value\": \"Joshua Nussbaum\"}, {\"lang\": \"en\", \"type\": \"coordinator\", \"value\": \"Jonatan M\\u00e4nnchen / EEF\"}], \"impacts\": [{\"capecId\": \"CAPEC-250\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-250 XML Injection\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV4_0\": {\"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\", \"providerUrgency\": \"NOT_DEFINED\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"NONE\", \"subIntegrityImpact\": \"LOW\", \"vulnIntegrityImpact\": \"NONE\", \"subAvailabilityImpact\": \"NONE\", \"vulnAvailabilityImpact\": \"NONE\", \"subConfidentialityImpact\": \"NONE\", \"vulnConfidentialityImpact\": \"NONE\", \"vulnerabilityResponseEffort\": \"NOT_DEFINED\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"cpes\": [\"cpe:2.3:a:joshnuss:xml_builder:*:*:*:*:*:*:*:*\"], \"repo\": \"https://github.com/joshnuss/xml_builder\", \"vendor\": \"joshnuss\", \"modules\": [\"\u0027Elixir.XmlBuilder\u0027\"], \"product\": \"xml_builder\", \"versions\": [{\"status\": \"affected\", \"version\": \"0.0.7\", \"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\": \"\u0027Elixir.XmlBuilder\u0027:generate/1\"}, {\"name\": \"\u0027Elixir.XmlBuilder\u0027:generate/2\"}, {\"name\": \"\u0027Elixir.XmlBuilder\u0027:escape/1\"}]}, {\"cpes\": [\"cpe:2.3:a:joshnuss:xml_builder:*:*:*:*:*:*:*:*\"], \"repo\": \"https://github.com/joshnuss/xml_builder\", \"vendor\": \"joshnuss\", \"modules\": [\"\u0027Elixir.XmlBuilder\u0027\"], \"product\": \"xml_builder\", \"versions\": [{\"status\": \"affected\", \"version\": \"26766f884ed19adee1563522c7afb5f056a6f3b5\", \"lessThan\": \"bfb1ada071ccc1e384c30f782197ca5154106706\", \"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\": \"\u0027Elixir.XmlBuilder\u0027:generate/1\"}, {\"name\": \"\u0027Elixir.XmlBuilder\u0027:generate/2\"}, {\"name\": \"\u0027Elixir.XmlBuilder\u0027:escape/1\"}]}], \"references\": [{\"url\": \"https://github.com/joshnuss/xml_builder/security/advisories/GHSA-67r9-hmxw-h595\", \"tags\": [\"vendor-advisory\", \"related\"]}, {\"url\": \"https://cna.erlef.org/cves/CVE-2026-47080.html\", \"tags\": [\"related\"]}, {\"url\": \"https://osv.dev/vulnerability/EEF-CVE-2026-47080\", \"tags\": [\"related\"]}, {\"url\": \"https://github.com/joshnuss/xml_builder/commit/bfb1ada071ccc1e384c30f782197ca5154106706\", \"tags\": [\"patch\"]}], \"descriptions\": [{\"lang\": \"en\", \"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.escape/1.\\n\\nThe escape/1 clause for {:cdata, data} in lib/xml_builder.ex concatenates data verbatim between the CDATA opener \u003c![CDATA[ and closer ]]\u003e without rewriting or splitting on the embedded ]]\u003e sequence. Because CDATA sections have no internal escape mechanism, the only safe way to embed arbitrary bytes is to split on ]]\u003e and emit adjacent CDATA sections. An attacker who can supply input containing ]]\u003e closes the CDATA section early; any bytes that follow are parsed as ordinary XML markup by downstream consumers, allowing injection of arbitrary elements, text, or entity references into the output document.\\n\\nThis issue affects xml_builder: from 0.0.7 before 2.4.1.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eXML Injection vulnerability in joshnuss xml_builder (\u003ccode\u003eXmlBuilder\u003c/code\u003e module) allows Content Spoofing, XML Injection.\u003c/p\u003e\\n\u003cp\u003eThis vulnerability is associated with program files \u003ccode\u003elib/xml_builder.ex\u003c/code\u003e and program routines \u003ccode\u003eXmlBuilder.generate/1\u003c/code\u003e, \u003ccode\u003eXmlBuilder.generate/2\u003c/code\u003e, \u003ccode\u003eXmlBuilder.escape/1\u003c/code\u003e.\u003c/p\u003e\\n\u003cp\u003eThe \u003ccode\u003eescape/1\u003c/code\u003e clause for \u003ccode\u003e{:cdata, data}\u003c/code\u003e in \u003ccode\u003elib/xml_builder.ex\u003c/code\u003e concatenates data verbatim between the CDATA opener \u003ccode\u003e\u0026lt;![CDATA[\u003c/code\u003e and closer \u003ccode\u003e]]\u0026gt;\u003c/code\u003e without rewriting or splitting on the embedded \u003ccode\u003e]]\u0026gt;\u003c/code\u003e sequence. Because CDATA sections have no internal escape mechanism, the only safe way to embed arbitrary bytes is to split on \u003ccode\u003e]]\u0026gt;\u003c/code\u003e and emit adjacent CDATA sections. An attacker who can supply input containing \u003ccode\u003e]]\u0026gt;\u003c/code\u003e closes the CDATA section early; any bytes that follow are parsed as ordinary XML markup by downstream consumers, allowing injection of arbitrary elements, text, or entity references into the output document.\u003c/p\u003e\\n\u003cp\u003eThis issue affects xml_builder: from 0.0.7 before 2.4.1.\u003c/p\u003e\", \"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.escape/1`.\\n\\nThe `escape/1` clause for `{:cdata, data}` in `lib/xml_builder.ex` concatenates data verbatim between the CDATA opener `\u003c![CDATA[` and closer `]]\u003e` without rewriting or splitting on the embedded `]]\u003e` sequence. Because CDATA sections have no internal escape mechanism, the only safe way to embed arbitrary bytes is to split on `]]\u003e` and emit adjacent CDATA sections. An attacker who can supply input containing `]]\u003e` closes the CDATA section early; any bytes that follow are parsed as ordinary XML markup by downstream consumers, allowing injection of arbitrary elements, text, or entity references into the output document.\\n\\nThis issue affects xml_builder: from 0.0.7 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\": \"0.0.7\"}], \"operator\": \"OR\"}], \"operator\": \"AND\"}], \"providerMetadata\": {\"orgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"shortName\": \"EEF\", \"dateUpdated\": \"2026-08-21T09:49:34.772Z\"}}}",
"cveMetadata": "{\"cveId\": \"CVE-2026-47080\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-08-21T12:32:15.846Z\", \"dateReserved\": \"2026-05-18T17:28:10.319Z\", \"assignerOrgId\": \"6b3ad84c-e1a6-4bf7-a703-f496b71e49db\", \"datePublished\": \"2026-08-21T09:49:34.772Z\", \"assignerShortName\": \"EEF\"}",
"dataType": "CVE_RECORD",
"dataVersion": "5.2"
}
}
}
Loading…
Loading…
Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Published Proof of Concept: A public proof of concept is available for this vulnerability.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
Loading…
Loading…