CVE-2026-83609 (GCVE-0-2026-83609)

Vulnerability from cvelistv5 – Published: 2026-09-01 14:29 – Updated: 2026-09-01 14:29
VLAI
Title
xmldom: Creation-time XML Name/QName validation is bypassable via an embedded line terminator, allowing injection on the default serialization path
Summary
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. From 0.9.0 until 0.9.12, the shared reg() builder in lib/grammar.js compiles the anchored QName_exact validator with the multiline flag, so ^ and $ validate only one line instead of the complete name. createElementNS, createAttributeNS, createDocumentType, and createAttribute consequently accept a malformed XML name whose first line is valid and whose later text injects markup when serialized through either the default path or requireWellFormed: true. The triggering ECMAScript line terminators are U+000A, U+000D, U+2028, and U+2029. This issue is fixed in @xmldom/xmldom version 0.9.12.
Severity
8.7 (High)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-91 - XML Injection (aka Blind XPath Injection)
  • CWE-625 - Permissive Regular Expression
Assigner
References
Impacted products
Vendor Product Version CPE status
xmldom xmldom Affected: >= 0.9.0, < 0.9.12
guessed Create a notification for this product.
@xmldom xmldom Affected: >= 0.9.0, < 0.9.12
guessed Create a notification for this product.
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{
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        }
      ],
      "metrics": [
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            "attackVector": "NETWORK",
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
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        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
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          "name": "https://github.com/xmldom/xmldom/security/advisories/GHSA-3px3-54cx-rmw9",
          "tags": [
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          "url": "https://github.com/xmldom/xmldom/security/advisories/GHSA-3px3-54cx-rmw9"
        },
        {
          "name": "https://github.com/xmldom/xmldom/pull/1071",
          "tags": [
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          "url": "https://github.com/xmldom/xmldom/pull/1071"
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        },
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          "tags": [
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          "url": "https://github.com/xmldom/xmldom/releases/tag/0.9.12"
        }
      ],
      "source": {
        "advisory": "GHSA-3px3-54cx-rmw9",
        "discovery": "UNKNOWN"
      },
      "title": "xmldom: Creation-time XML Name/QName validation is bypassable via an embedded line terminator, allowing injection on the default serialization path"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
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    "cveId": "CVE-2026-83609",
    "datePublished": "2026-09-01T14:29:40.475Z",
    "dateReserved": "2026-08-31T20:36:25.743Z",
    "dateUpdated": "2026-09-01T14:29:40.475Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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  }
}



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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 exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.