CVE-2026-15007

{
  "id": "CVE-2026-15007",
  "sourceIdentifier": "[email protected]",
  "published": "2026-07-17T16:17:13.743",
  "lastModified": "2026-10-24T20:10:00.137",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A denial of service vulnerability was identified in GitHub Enterprise Server that allowed an authenticated user to cause service disruption by supplying a repository release notes configuration file containing deeply nested YAML. When release notes were generated, the configuration file was parsed without a nesting depth limit, causing excessive resource consumption that could render the instance unresponsive. This vulnerability affected all versions of GitHub Enterprise Server prior to 3.22 and was fixed in versions 3.17.18, 3.18.12, 3.19.9, 3.20.5, and 3.21.3. This vulnerability was reported via the GitHub Bug Bounty program."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de denegación de servicio fue identificada en GitHub Enterprise Server que permitía a un usuario autenticado causar una interrupción del servicio al proporcionar un archivo de configuración de notas de lanzamiento de repositorio que contenía YAML profundamente anidado. Cuando se generaban las notas de lanzamiento, el archivo de configuración era analizado sin un límite de profundidad de anidamiento, causando un consumo excesivo de recursos que podía dejar la instancia sin respuesta. Esta vulnerabilidad afectó a todas las versiones de GitHub Enterprise Server anteriores a la 3.22 y fue corregida en las versiones 3.17.18, 3.18.12, 3.19.9, 3.20.5 y 3.21.3. Esta vulnerabilidad fue reportada a través del programa GitHub Bug Bounty."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "GitHub",
          "product": "Enterprise Server",
          "defaultStatus": "affected",
          "versions": [
            {
              "version": "3.17.0",
              "lessThanOrEqual": "3.17.17",
              "versionType": "semver",
              "status": "affected",
              "changes": [
                {
                  "at": "3.17.18",
                  "status": "unaffected"
                }
              ]
            },
            {
              "version": "3.18.0",
              "lessThanOrEqual": "3.18.11",
              "versionType": "semver",
              "status": "affected",
              "changes": [
                {
                  "at": "3.18.12",
                  "status": "unaffected"
                }
              ]
            },
            {
              "version": "3.19.0",
              "lessThanOrEqual": "3.19.8",
              "versionType": "semver",
              "status": "affected",
              "changes": [
                {
                  "at": "3.19.9",
                  "status": "unaffected"
                }
              ]
            },
            {
              "version": "3.20.0",
              "lessThanOrEqual": "3.20.4",
              "versionType": "semver",
              "status": "affected",
              "changes": [
                {
                  "at": "3.20.5",
                  "status": "unaffected"
                }
              ]
            },
            {
              "version": "3.21.0",
              "lessThanOrEqual": "3.21.2",
              "versionType": "semver",
              "status": "affected",
              "changes": [
                {
                  "at": "3.21.3",
                  "status": "unaffected"
                }
              ]
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV40": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "4.0",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/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",
          "baseScore": 5.7,
          "baseSeverity": "MEDIUM",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "attackRequirements": "NONE",
          "privilegesRequired": "LOW",
          "userInteraction": "NONE",
          "vulnConfidentialityImpact": "NONE",
          "vulnIntegrityImpact": "NONE",
          "vulnAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "NONE",
          "subIntegrityImpact": "NONE",
          "subAvailabilityImpact": "HIGH",
          "exploitMaturity": "UNREPORTED",
          "confidentialityRequirement": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "availabilityRequirement": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "valueDensity": "NOT_DEFINED",
          "vulnerabilityResponseEffort": "NOT_DEFINED",
          "providerUrgency": "NOT_DEFINED"
        }
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-07-17T16:35:53.532624Z",
          "id": "CVE-2026-15007",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-770"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://docs.github.com/en/[email protected]/admin/release-notes#3.17.18",
      "source": "[email protected]"
    },
    {
      "url": "https://docs.github.com/en/[email protected]/admin/release-notes#3.18.12",
      "source": "[email protected]"
    },
    {
      "url": "https://docs.github.com/en/[email protected]/admin/release-notes#3.19.9",
      "source": "[email protected]"
    },
    {
      "url": "https://docs.github.com/en/[email protected]/admin/release-notes#3.20.5",
      "source": "[email protected]"
    },
    {
      "url": "https://docs.github.com/en/[email protected]/admin/release-notes#3.21.3",
      "source": "[email protected]"
    }
  ]
}