FKIE_CVE-2026-48590

Vulnerability from fkie_nvd - Published: 2026-08-21 10:16 - Updated: 2026-08-21 13:18
Severity
2.1 (Low) - 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
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.element/1, XmlBuilder.element/2, XmlBuilder.element/3. Element 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. This issue affects xml_builder: from 0.0.1 before 2.4.1.
References
6b3ad84c-e1a6-4bf7-a703-f496b71e49dbhttps://cna.erlef.org/cves/CVE-2026-48590.html
6b3ad84c-e1a6-4bf7-a703-f496b71e49dbhttps://github.com/joshnuss/xml_builder/commit/d5c0aec32a8eecbb440fb9bbb0f59d4d188d5859
6b3ad84c-e1a6-4bf7-a703-f496b71e49dbhttps://github.com/joshnuss/xml_builder/security/advisories/GHSA-r82p-3q2p-728w
6b3ad84c-e1a6-4bf7-a703-f496b71e49dbhttps://osv.dev/vulnerability/EEF-CVE-2026-48590
134c704f-9b21-4f2e-91b3-4a467353bcc0https://github.com/joshnuss/xml_builder/security/advisories/GHSA-r82p-3q2p-728w
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "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:element/1"
            },
            {
              "name": "\u0027Elixir.XmlBuilder\u0027:element/2"
            },
            {
              "name": "\u0027Elixir.XmlBuilder\u0027:element/3"
            }
          ],
          "repo": "https://github.com/joshnuss/xml_builder",
          "vendor": "joshnuss",
          "versions": [
            {
              "lessThan": "2.4.1",
              "status": "affected",
              "version": "0.0.1",
              "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:element/1"
            },
            {
              "name": "\u0027Elixir.XmlBuilder\u0027:element/2"
            },
            {
              "name": "\u0027Elixir.XmlBuilder\u0027:element/3"
            }
          ],
          "repo": "https://github.com/joshnuss/xml_builder",
          "vendor": "joshnuss",
          "versions": [
            {
              "lessThan": "d5c0aec32a8eecbb440fb9bbb0f59d4d188d5859",
              "status": "affected",
              "version": "9fb49131ad3ee146a4c9db9bc175bdffe32e30a0",
              "versionType": "git"
            }
          ]
        }
      ],
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db"
    }
  ],
  "cveTags": [],
  "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.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 (\u003c, \u003e, \", \u0027, \u0026). 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."
    }
  ],
  "id": "CVE-2026-48590",
  "lastModified": "2026-08-21T13:18:06.993",
  "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": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-91"
        }
      ],
      "source": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
      "type": "Secondary"
    }
  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.