{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "8.19.11"
              },
              {
                "fixed": "8.19.21"
              },
              {
                "introduced": "9.3.0"
              },
              {
                "fixed": "9.4.6"
              },
              {
                "introduced": "9.5.0"
              },
              {
                "fixed": "9.5.2"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "c5253e1bcb0268a5dafed9dee18e16fd3144d7d6"
            },
            {
              "fixed": "4fe44c255c3d0da06779b921e132cdc555ed9aff"
            },
            {
              "introduced": "17b451d8979a29e31935fe1eb901310350b30e62"
            },
            {
              "fixed": "10011cbc74640115d0ffac0cef7c925aec4754f5"
            },
            {
              "introduced": "8d4246a64bc255212407b1b313fe402391299c88"
            },
            {
              "fixed": "b42549c72e6e040825b13e5d8ebf7ff63886b24d"
            }
          ],
          "repo": "https://github.com/elastic/elasticsearch",
          "type": "GIT"
        }
      ]
    },
    {
      "ranges": [
        {
          "database_specific": {
            "cpe": "cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*",
            "extracted_events": [
              {
                "introduced": "8.19.11"
              },
              {
                "fixed": "8.19.21"
              },
              {
                "introduced": "9.3.0"
              },
              {
                "fixed": "9.4.6"
              },
              {
                "introduced": "9.5.0"
              },
              {
                "fixed": "9.5.2"
              }
            ],
            "source": "CPE_RANGE"
          },
          "events": [
            {
              "introduced": "c14722b56e3d34d5203bd311e91f9ec49227b044"
            },
            {
              "fixed": "f8b192d79d9df731fc3811263f4461d842834c6a"
            },
            {
              "introduced": "30ab63cc0017fe2da7a84fb9b285dd762468802d"
            },
            {
              "fixed": "692551ad493ed71169e295e2160446428ee00b15"
            },
            {
              "introduced": "240f7d17d21408117f4295bcf74d48092ab0d078"
            },
            {
              "fixed": "37dc1e9d6dbf80bb1cf22da5ed258d3f642d2f9c"
            }
          ],
          "repo": "https://github.com/elastic/kibana",
          "type": "GIT"
        }
      ]
    }
  ],
  "database_specific": {
    "cna_assigner": "elastic",
    "cwe_ids": [
      "CWE-863"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78606.json",
    "unresolved_ranges": [
      {
        "extracted_events": [
          {
            "introduced": "8.19.11"
          },
          {
            "last_affected": "8.19.20"
          },
          {
            "introduced": "9.3.0"
          },
          {
            "last_affected": "9.4.5"
          },
          {
            "introduced": "9.5.0"
          },
          {
            "last_affected": "9.5.1"
          }
        ],
        "source": "AFFECTED_FIELD"
      }
    ]
  },
  "details": "Incorrect Authorization (CWE-863) in Kibana can lead to unauthorized disclosure, modification, and deletion of data via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). Where two authenticated principals originating from different authentication realms share the same username value, one could read, modify, and delete the other's private Elastic AI Assistant Knowledge Base entries.",
  "id": "CVE-2026-78606",
  "modified": "2026-09-05T03:30:44.788597447Z",
  "published": "2026-09-01T19:20:37.599Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://discuss.elastic.co/t/kibana-8-19-21-9-4-6-9-5-2-security-update-esa-2026-142/390093"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/78xxx/CVE-2026-78606.json"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-78606"
    }
  ],
  "schema_version": "1.9.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ],
  "summary": "Incorrect Authorization in Kibana Leading to Unauthorized Disclosure, Modification, and Deletion of Data"
}