{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "8.0.0"
              },
              {
                "fixed": "8.19.16"
              },
              {
                "introduced": "9.0.0"
              },
              {
                "fixed": "9.3.5"
              },
              {
                "introduced": "9.4.0"
              },
              {
                "fixed": "9.4.2"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "1b6a7ece17463df5ff54a3e1302d825889aa1161"
            },
            {
              "fixed": "0ecfe314ed6ddebb736091bf37b3b6758209b73b"
            },
            {
              "introduced": "112859b85d50de2a7e63f73c8fc70b99eea24291"
            },
            {
              "fixed": "7dcc32bebba091844c0207f9dae8fda6c7d08542"
            },
            {
              "introduced": "2e8528e92361c3399724226deaf2b46f933e925b"
            },
            {
              "fixed": "c402c2b36d90eae29c0182f86bd9050fd0b746cc"
            }
          ],
          "repo": "https://github.com/elastic/elasticsearch",
          "type": "GIT"
        }
      ]
    },
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "8.0.0"
              },
              {
                "fixed": "8.19.16"
              },
              {
                "introduced": "9.0.0"
              },
              {
                "fixed": "9.3.5"
              },
              {
                "introduced": "9.4.0"
              },
              {
                "fixed": "9.4.2"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "57ca5e139a33dd2eed927ce98d8231a1f217cd15"
            },
            {
              "fixed": "209c12d77d1bf1bc561abff2b91aa95f354734a3"
            },
            {
              "introduced": "504d6bfa94cca17fabb76e06152c30c4f0c3efdd"
            },
            {
              "fixed": "db396449a69d0613b0b4dc8b8e9789aa35504e0f"
            },
            {
              "introduced": "b2e39752e03b56f48f51943214475ddba1f8e974"
            },
            {
              "fixed": "ca34dedcfe614964fe236c237a023021da0a8665"
            }
          ],
          "repo": "https://github.com/elastic/kibana",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "elastic",
    "cwe_ids": [
      "CWE-400"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42400.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "9.4.0"
          },
          {
            "last_affected": "9.4.1"
          },
          {
            "introduced": "9.0.0"
          },
          {
            "last_affected": "9.3.4"
          },
          {
            "introduced": "8.0.0"
          },
          {
            "last_affected": "8.19.15"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Uncontrolled Resource Consumption (CWE-400) in Kibana can lead to denial of service via Excessive Allocation (CAPEC-130). An authenticated user can send a specially crafted compressed request payload that is processed prior to authorization checks, causing excessive memory and CPU resource consumption that can result in a Kibana instance becoming unresponsive or crashing.",
  "id": "CVE-2026-42400",
  "modified": "2026-07-15T01:49:17.303128746Z",
  "published": "2026-05-28T19:42:11.414Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://discuss.elastic.co/t/kibana-8-19-16-9-3-5-9-4-2-security-update-esa-2026-35/386554"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42400.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-42400"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Uncontrolled Resource Consumption in Kibana Leading to Denial of Service"
}