Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-05-12 08:50

Modified

2026-05-12 09:14

Summary

DoS attack via DOMNode::C14N()

Details

In PHP versions 8.4. before 8.4.21 and 8.5. before 8.5.6, DOMNode::C14N() method may process the XML data incorrectly, causing a circular linked list in the data structure representing the XML document. This may cause subsequent processing of the XML document to enter infinite loop, causing denial of service in the processing application.

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "libphp",
        "purl": "pkg:bitnami/libphp"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "8.4.0"
            },
            {
              "fixed": "8.4.21"
            },
            {
              "introduced": "8.5.0"
            },
            {
              "fixed": "8.5.6"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/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:Y/R:X/V:X/RE:M/U:Amber",
          "type": "CVSS_V4"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-7263"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:php:php:*:*:*:*:*:*:*:*"
    ],
    "severity": "Medium"
  },
  "details": "In PHP versions 8.4.* before 8.4.21 and 8.5.* before 8.5.6, DOMNode::C14N()\u00a0method may process the XML data incorrectly, causing a circular linked list in the data structure representing the XML document. This may cause subsequent processing of the XML document to enter infinite loop, causing denial of service in the processing application.",
  "id": "BIT-libphp-2026-7263",
  "modified": "2026-05-12T09:14:35.689Z",
  "published": "2026-05-12T08:50:32.155Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/php/php-src/security/advisories/GHSA-4jhr-8w89-j733"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-7263"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "DoS attack via DOMNode::C14N()"
}

CVE-2026-7263 (GCVE-0-2026-7263)

Vulnerability from cvelistv5 – Published: 2026-05-10 04:43 – Updated: 2026-05-11 13:04

Title

DoS attack via DOMNode::C14N()

Summary

In PHP versions 8.4.* before 8.4.21 and 8.5.* before 8.5.6, DOMNode::C14N() method may process the XML data incorrectly, causing a circular linked list in the data structure representing the XML document. This may cause subsequent processing of the XML document to enter infinite loop, causing denial of service in the processing application.

Severity ?

6.3 (Medium)


                        
                          CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/AU:Y/RE:M/U:Amber

CWE

CWE-404 - Improper Resource Shutdown or Release
CWE-835 - Loop with unreachable exit condition ('infinite loop')

Assigner

php

References

1 reference

URL	Tags
https://github.com/php/php-src/security/advisorie…	vendor-advisory

Impacted products

1 product

Vendor	Product	Version
PHP Group	PHP	Affected: 8.4.* , < 8.4.21 (semver) Affected: 8.5.* , < 8.5.6 (semver)

Date Public ?

2026-05-07 00:00

Credits

Nikita Sveshnikov (Positive Technologies) Ilija Tovilo

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-7263",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-11T13:04:22.553796Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-11T13:04:26.399Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "packageName": "dom",
          "product": "PHP",
          "vendor": "PHP Group",
          "versions": [
            {
              "lessThan": "8.4.21",
              "status": "affected",
              "version": "8.4.*",
              "versionType": "semver"
            },
            {
              "lessThan": "8.5.6",
              "status": "affected",
              "version": "8.5.*",
              "versionType": "semver"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "Nikita Sveshnikov (Positive Technologies)"
        },
        {
          "lang": "en",
          "type": "remediation reviewer",
          "value": "Ilija Tovilo"
        }
      ],
      "datePublic": "2026-05-07T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "In PHP versions 8.4.* before 8.4.21 and 8.5.* before 8.5.6, \u003ccode\u003eDOMNode::C14N()\u003c/code\u003e\u0026nbsp;method may process the XML data incorrectly, causing a circular linked list in the data structure representing the XML document. This may cause subsequent processing of the XML document to enter infinite loop, causing denial of service in the processing application.\u003cdiv\u003e\u003cbr\u003e\u003c/div\u003e"
            }
          ],
          "value": "In PHP versions 8.4.* before 8.4.21 and 8.5.* before 8.5.6, DOMNode::C14N()\u00a0method may process the XML data incorrectly, causing a circular linked list in the data structure representing the XML document. This may cause subsequent processing of the XML document to enter infinite loop, causing denial of service in the processing application."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "YES",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6.3,
            "baseSeverity": "MEDIUM",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "AMBER",
            "subAvailabilityImpact": "LOW",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:L/AU:Y/RE:M/U:Amber",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "NONE",
            "vulnIntegrityImpact": "NONE",
            "vulnerabilityResponseEffort": "MODERATE"
          },
          "format": "CVSS",
          "scenarios": [
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              "value": "GENERAL"
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      "problemTypes": [
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          "descriptions": [
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              "cweId": "CWE-404",
              "description": "CWE-404 Improper Resource Shutdown or Release",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-835",
              "description": "CWE-835 Loop with unreachable exit condition (\u0027infinite loop\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-05-10T04:46:28.150Z",
        "orgId": "dd77f84a-d19a-4638-8c3d-a322d820ed2b",
        "shortName": "php"
      },
      "references": [
        {
          "tags": [
            "vendor-advisory"
          ],
          "url": "https://github.com/php/php-src/security/advisories/GHSA-4jhr-8w89-j733"
        }
      ],
      "source": {
        "advisory": "GHSA-4jhr-8w89-j733",
        "discovery": "EXTERNAL"
      },
      "title": "DoS attack via DOMNode::C14N()",
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      }
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  },
  "cveMetadata": {
    "assignerOrgId": "dd77f84a-d19a-4638-8c3d-a322d820ed2b",
    "assignerShortName": "php",
    "cveId": "CVE-2026-7263",
    "datePublished": "2026-05-10T04:43:04.483Z",
    "dateReserved": "2026-04-28T05:12:25.217Z",
    "dateUpdated": "2026-05-11T13:04:26.399Z",
    "state": "PUBLISHED"
  },
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  "dataVersion": "5.2"
}

Sightings

Author	Source	Type	Date	Other

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.

Action not permitted

Vulnerability from bitnami_vulndb

CVE-2026-7263 (GCVE-0-2026-7263)

Tags

Sightings

Nomenclature