CVE-2026-83610 (GCVE-0-2026-83610)

Vulnerability from cvelistv5 – Published: 2026-09-01 14:31 – Updated: 2026-09-01 14:31
VLAI
Title
xmldom: XML fragment injection via invalid EntityReference.nodeName during requireWellFormed serialization
Summary
xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.15 and 0.9.12, and in xmldom version 0.6.0 and earlier, Document.createEntityReference(name) accepts an invalid name and the ENTITY_REFERENCE_NODE serializer emits the resulting nodeName directly in &name; form. Directly serializing the node or fragment with XMLSerializer.serializeToString() and requireWellFormed: true can therefore break the entity-reference boundary and produce attacker-controlled XML markup when reparsed. The parser does not ordinarily create these nodes, and element-child insertion is rejected, so exploitation requires an application to create and directly serialize an EntityReference. This issue is fixed in @xmldom/xmldom versions 0.8.15 and 0.9.12; no fixed version is available for xmldom.
Severity
6.3 (Medium)
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-116 - Improper Encoding or Escaping of Output
Assigner
References
Impacted products
Vendor Product Version CPE status
xmldom xmldom Affected: <= 0.6.0
guessed Create a notification for this product.
@xmldom xmldom Affected: >= 0.7.0, < 0.8.15
Affected: >= 0.9.0, < 0.9.12
guessed Create a notification for this product.
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        {
          "product": "xmldom",
          "vendor": "xmldom",
          "versions": [
            {
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              "version": "\u003c= 0.6.0"
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          "versions": [
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              "status": "affected",
              "version": "\u003e= 0.7.0, \u003c 0.8.15"
            },
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              "version": "\u003e= 0.9.0, \u003c 0.9.12"
            }
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          "value": "xmldom is a pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. Prior to @xmldom/xmldom versions 0.8.15 and 0.9.12, and in xmldom version 0.6.0 and earlier, Document.createEntityReference(name) accepts an invalid name and the ENTITY_REFERENCE_NODE serializer emits the resulting nodeName directly in \u0026name; form. Directly serializing the node or fragment with XMLSerializer.serializeToString() and requireWellFormed: true can therefore break the entity-reference boundary and produce attacker-controlled XML markup when reparsed. The parser does not ordinarily create these nodes, and element-child insertion is rejected, so exploitation requires an application to create and directly serialize an EntityReference. This issue is fixed in @xmldom/xmldom versions 0.8.15 and 0.9.12; no fixed version is available for xmldom."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "NONE",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "NONE",
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            "vulnIntegrityImpact": "LOW"
          }
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        "dateUpdated": "2026-09-01T14:31:49.409Z",
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        "shortName": "GitHub_M"
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          "url": "https://github.com/xmldom/xmldom/security/advisories/GHSA-6gmq-8vp8-gcm6"
        },
        {
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          "tags": [
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          "tags": [
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          "url": "https://github.com/xmldom/xmldom/pull/1072"
        },
        {
          "name": "https://github.com/xmldom/xmldom/commit/4664386e4f4d99d17b416a151dbe8323e245284b",
          "tags": [
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          ],
          "url": "https://github.com/xmldom/xmldom/commit/4664386e4f4d99d17b416a151dbe8323e245284b"
        },
        {
          "name": "https://github.com/xmldom/xmldom/commit/6c3fb5ffeafe7901ec928ce9010988dd716c94a0",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/xmldom/xmldom/commit/6c3fb5ffeafe7901ec928ce9010988dd716c94a0"
        },
        {
          "name": "https://github.com/xmldom/xmldom/releases/tag/0.8.15",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/xmldom/xmldom/releases/tag/0.8.15"
        },
        {
          "name": "https://github.com/xmldom/xmldom/releases/tag/0.9.12",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/xmldom/xmldom/releases/tag/0.9.12"
        }
      ],
      "source": {
        "advisory": "GHSA-6gmq-8vp8-gcm6",
        "discovery": "UNKNOWN"
      },
      "title": "xmldom: XML fragment injection via invalid EntityReference.nodeName during requireWellFormed serialization"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-83610",
    "datePublished": "2026-09-01T14:31:49.409Z",
    "dateReserved": "2026-08-31T20:36:25.743Z",
    "dateUpdated": "2026-09-01T14:31:49.409Z",
    "state": "PUBLISHED"
  },
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  "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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • 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.