cve-2026-8177

HIGH CVSS 7.5 nvd
Description

XML::LibXML versions through 2.0210 for Perl read out-of-bounds heap memory when parsing XML node names containing truncated UTF-8 byte sequences. A node name ending in the middle of a multi byte UTF-8 sequence causes the parser to read past the end of the input string into adjacent heap memory. Any Perl process that passes attacker controlled strings to XML::LibXML's DOM node-name methods can reach this path on the default API. The likely consequence is a crash, causing denial of service.

Timeline
Published
2026-05-10
Last Modified
2026-09-18
CVSS Details
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
Affected Products

No product information available.

Weaknesses (CWE)
CWE-125
CVSS metrics
Version Base Severity Vector Exploitability Impact Source
3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 3.9 3.6 134c704f-9b21-4f2e-91b3-4a467353bcc0
3.1 7.5 HIGH CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H 3.9 3.6 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
NVD metadata
NVD status
Deferred
Source identifier
9b29abf9-4ab0-4765-b253-1875cd9b441e
References
Linked Vulnerabilities
azurelinux3-86550 azure_linux
alas2-2026-3342 amazon_linux
alas2023-2026-1795 amazon_linux
elsa-2026-39547 oracle_linux
elsa-2026-39553 oracle_linux
elsa-2026-39878 oracle_linux 

{
  "cvss": 7.5,
  "datePublished": "2026-05-10T21:16:30.003",
  "dateUpdated": "2026-09-18T13:18:37.633",
  "description": "XML::LibXML versions through 2.0210 for Perl read out-of-bounds heap memory when parsing XML node names containing truncated UTF-8 byte sequences.\n\nA node name ending in the middle of a multi byte UTF-8 sequence causes the parser to read past the end of the input string into adjacent heap memory.\n\nAny Perl process that passes attacker controlled strings to XML::LibXML's DOM node-name methods can reach this path on the default API. The likely consequence is a crash, causing denial of service.",
  "id": "CVE-2026-8177",
  "raw": {
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            "defaultStatus": "unaffected",
            "packageName": "XML-LibXML",
            "product": "XML::LibXML",
            "programFiles": [
              "dom.c"
            ],
            "repo": "https://github.com/cpan-authors/XML-LibXML",
            "vendor": "SHLOMIF",
            "versions": [
              {
                "lessThanOrEqual": "2.0210",
                "status": "affected",
                "version": "0",
                "versionType": "custom"
              }
            ]
          }
        ],
        "source": "9b29abf9-4ab0-4765-b253-1875cd9b441e"
      },
      {
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            "cpes": [
              "cpe:/o:redhat:enterprise_linux:10.2"
            ],
            "defaultStatus": "affected",
            "packageName": "perl-XML-LibXML",
            "product": "Red Hat Enterprise Linux 10",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "1:2.0210-4.el10_2.1",
                "versionType": "rpm"
              }
            ]
          },
          {
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            "cpes": [
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            "defaultStatus": "affected",
            "packageName": "perl-XML-LibXML",
            "product": "Red Hat Enterprise Linux 10.0 Extended Update Support",
            "vendor": "Red Hat",
            "versions": [
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                "status": "unaffected",
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            "cpes": [
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            "defaultStatus": "affected",
            "packageName": "perl-XML-LibXML",
            "product": "Red Hat Enterprise Linux 8",
            "vendor": "Red Hat",
            "versions": [
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                "lessThan": "*",
                "status": "unaffected",
                "version": "1:2.0132-3.el8_10",
                "versionType": "rpm"
              }
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          },
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            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:enterprise_linux:9"
            ],
            "defaultStatus": "affected",
            "packageName": "perl-XML-LibXML",
            "product": "Red Hat Enterprise Linux 9",
            "vendor": "Red Hat",
            "versions": [
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                "lessThan": "*",
                "status": "unaffected",
                "version": "1:2.0206-5.el9_8.1",
                "versionType": "rpm"
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            ]
          },
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            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:rhel_e4s:9.2"
            ],
            "defaultStatus": "affected",
            "packageName": "perl-XML-LibXML",
            "product": "Red Hat Enterprise Linux 9.2 Update Services for SAP Solutions",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "1:2.0206-5.el9_2.1",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:rhel_e4s:9.4"
            ],
            "defaultStatus": "affected",
            "packageName": "perl-XML-LibXML",
            "product": "Red Hat Enterprise Linux 9.4 Update Services for SAP Solutions",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "1:2.0206-5.el9_4.1",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
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            ],
            "defaultStatus": "affected",
            "packageName": "perl-XML-LibXML",
            "product": "Red Hat Enterprise Linux 9.6 Extended Update Support",
            "vendor": "Red Hat",
            "versions": [
              {
                "lessThan": "*",
                "status": "unaffected",
                "version": "1:2.0206-5.el9_6.1",
                "versionType": "rpm"
              }
            ]
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
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            "defaultStatus": "unknown",
            "packageName": "perl-XML-LibXML",
            "product": "Red Hat Enterprise Linux 6",
            "vendor": "Red Hat"
          },
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            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/o:redhat:enterprise_linux:7"
            ],
            "defaultStatus": "affected",
            "packageName": "perl-XML-LibXML",
            "product": "Red Hat Enterprise Linux 7",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:openshift:4"
            ],
            "defaultStatus": "unaffected",
            "packageName": "openshift/ose-rhel-coreos-8",
            "product": "Red Hat OpenShift Container Platform 4",
            "vendor": "Red Hat"
          },
          {
            "collectionURL": "https://access.redhat.com/downloads/content/package-browser/",
            "cpes": [
              "cpe:/a:redhat:openshift:4"
            ],
            "defaultStatus": "unaffected",
            "packageName": "openshift/ose-rhel-coreos-9",
            "product": "Red Hat OpenShift Container Platform 4",
            "vendor": "Red Hat"
          }
        ],
        "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c"
      }
    ],
    "cveTags": [],
    "descriptions": [
      {
        "lang": "en",
        "value": "XML::LibXML versions through 2.0210 for Perl read out-of-bounds heap memory when parsing XML node names containing truncated UTF-8 byte sequences.\n\nA node name ending in the middle of a multi byte UTF-8 sequence causes the parser to read past the end of the input string into adjacent heap memory.\n\nAny Perl process that passes attacker controlled strings to XML::LibXML's DOM node-name methods can reach this path on the default API. The likely consequence is a crash, causing denial of service."
      },
      {
        "lang": "es",
        "value": "Las versiones de XML::LibXML hasta la 2.0210 para Perl leen memoria del heap fuera de límites al analizar nombres de nodos XML que contienen secuencias de bytes UTF-8 truncadas.\n\nUn nombre de nodo que termina en medio de una secuencia UTF-8 multibyte hace que el analizador lea más allá del final de la cadena de entrada hacia la memoria del heap adyacente.\n\nCualquier proceso Perl que pasa cadenas controladas por el atacante a los métodos de nombre de nodo DOM de XML::LibXML puede alcanzar esta ruta en la API predeterminada. La consecuencia probable es un fallo, causando denegación de servicio."
      }
    ],
    "id": "CVE-2026-8177",
    "lastModified": "2026-09-18T13:18:37.633",
    "metrics": {
      "cvssMetricV31": [
        {
          "cvssData": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
            "version": "3.1"
          },
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          "impactScore": 3.6,
          "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "type": "Secondary"
        },
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 7.5,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "NONE",
            "integrityImpact": "NONE",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
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          "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
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                "exploitation": "none"
              },
              {
                "automatable": "yes"
              },
              {
                "technicalImpact": "partial"
              }
            ],
            "role": "CISA Coordinator",
            "timestamp": "2026-05-11T16:34:46.706997Z",
            "version": "2.0.3"
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    "vulnStatus": "Deferred",
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        "type": "Secondary"
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  },
  "severity": "HIGH",
  "source": "nvd",
  "title": "XML::LibXML versions through 2.0210 for Perl read out-of-bounds heap memory when parsing XML node names containing tr..."
}
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