CVE-2026-78606 (GCVE-0-2026-78606)

Vulnerability from cvelistv5 – Published: 2026-09-01 19:20 – Updated: 2026-09-01 19:40
VLAI
Title
Incorrect Authorization in Kibana Leading to Unauthorized Disclosure, Modification, and Deletion of Data
Summary
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.
Severity
4.2 (Medium)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-01 19:39 UTC
CWE
  • CWE-863 - Incorrect Authorization
Assigner
References
Impacted products
Vendor Product Version CPE status
Elastic Kibana Affected: 8.19.11 , ≤ 8.19.20 (semver)
Affected: 9.3.0 , ≤ 9.4.5 (semver)
Affected: 9.5.0 , ≤ 9.5.1 (semver)
guessed Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-78606",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-09-01T19:39:56.417764Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-09-01T19:40:45.659Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Kibana",
          "vendor": "Elastic",
          "versions": [
            {
              "lessThanOrEqual": "8.19.20",
              "status": "affected",
              "version": "8.19.11",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "9.4.5",
              "status": "affected",
              "version": "9.3.0",
              "versionType": "semver"
            },
            {
              "lessThanOrEqual": "9.5.1",
              "status": "affected",
              "version": "9.5.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eIncorrect 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\u0027s private Elastic AI Assistant Knowledge Base entries.\u003c/p\u003e"
            }
          ],
          "value": "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\u0027s private Elastic AI Assistant Knowledge Base entries."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-1",
          "descriptions": [
            {
              "lang": "en",
              "value": "CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs"
            }
          ]
        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "HIGH",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 4.2,
            "baseSeverity": "MEDIUM",
            "confidentialityImpact": "LOW",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N",
            "version": "3.1"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-863",
              "description": "CWE-863 Incorrect Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-09-01T19:20:37.599Z",
        "orgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a",
        "shortName": "elastic"
      },
      "references": [
        {
          "url": "https://discuss.elastic.co/t/kibana-8-19-21-9-4-6-9-5-2-security-update-esa-2026-142/390093"
        }
      ],
      "source": {
        "discovery": "Elastic"
      },
      "title": "Incorrect Authorization in Kibana Leading to Unauthorized Disclosure, Modification, and Deletion of Data",
      "x_generator": {
        "engine": "Elastic CVE Publisher 1.0.0"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a",
    "assignerShortName": "elastic",
    "cveId": "CVE-2026-78606",
    "datePublished": "2026-09-01T19:20:37.599Z",
    "dateReserved": "2026-08-24T21:13:52.890Z",
    "dateUpdated": "2026-09-01T19:40:45.659Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-78606",
      "date": "2026-09-02",
      "epss": "0.00145",
      "percentile": "0.04086"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-78606\",\"sourceIdentifier\":\"security@elastic.co\",\"published\":\"2026-09-01T20:17:23.887\",\"lastModified\":\"2026-09-02T14:52:59.080\",\"vulnStatus\":\"Analyzed\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"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\u0027s private Elastic AI Assistant Knowledge Base entries.\"}],\"affected\":[{\"source\":\"security@elastic.co\",\"affectedData\":[{\"vendor\":\"Elastic\",\"product\":\"Kibana\",\"defaultStatus\":\"unaffected\",\"versions\":[{\"version\":\"8.19.11\",\"lessThanOrEqual\":\"8.19.20\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"9.3.0\",\"lessThanOrEqual\":\"9.4.5\",\"versionType\":\"semver\",\"status\":\"affected\"},{\"version\":\"9.5.0\",\"lessThanOrEqual\":\"9.5.1\",\"versionType\":\"semver\",\"status\":\"affected\"}]}]}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"security@elastic.co\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N\",\"baseScore\":4.2,\"baseSeverity\":\"MEDIUM\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"LOW\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":1.6,\"impactScore\":2.5}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-09-01T19:39:56.417764Z\",\"id\":\"CVE-2026-78606\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"partial\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security@elastic.co\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-863\"}]}],\"configurations\":[{\"nodes\":[{\"operator\":\"OR\",\"negate\":false,\"cpeMatch\":[{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"8.19.11\",\"versionEndExcluding\":\"8.19.21\",\"matchCriteriaId\":\"DD87821B-138D-419C-BAC9-6FE017A1A8D0\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.3.0\",\"versionEndExcluding\":\"9.4.6\",\"matchCriteriaId\":\"CC81C8B0-2A82-43CE-BAFF-A6CED754F6DB\"},{\"vulnerable\":true,\"criteria\":\"cpe:2.3:a:elastic:kibana:*:*:*:*:*:*:*:*\",\"versionStartIncluding\":\"9.5.0\",\"versionEndExcluding\":\"9.5.2\",\"matchCriteriaId\":\"E7A56B22-8B0A-4CF4-A4FB-BBC7AFBA9525\"}]}]}],\"references\":[{\"url\":\"https://discuss.elastic.co/t/kibana-8-19-21-9-4-6-9-5-2-security-update-esa-2026-142/390093\",\"source\":\"security@elastic.co\",\"tags\":[\"Vendor Advisory\"]}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-78606\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"partial\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-09-01T19:39:56.417764Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-09-01T19:39:59.162Z\"}}], \"cna\": {\"title\": \"Incorrect Authorization in Kibana Leading to Unauthorized Disclosure, Modification, and Deletion of Data\", \"source\": {\"discovery\": \"Elastic\"}, \"impacts\": [{\"capecId\": \"CAPEC-1\", \"descriptions\": [{\"lang\": \"en\", \"value\": \"CAPEC-1 Accessing Functionality Not Properly Constrained by ACLs\"}]}], \"metrics\": [{\"format\": \"CVSS\", \"cvssV3_1\": {\"scope\": \"UNCHANGED\", \"version\": \"3.1\", \"baseScore\": 4.2, \"attackVector\": \"NETWORK\", \"baseSeverity\": \"MEDIUM\", \"vectorString\": \"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N\", \"integrityImpact\": \"LOW\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"HIGH\", \"availabilityImpact\": \"NONE\", \"privilegesRequired\": \"LOW\", \"confidentialityImpact\": \"LOW\"}, \"scenarios\": [{\"lang\": \"en\", \"value\": \"GENERAL\"}]}], \"affected\": [{\"vendor\": \"Elastic\", \"product\": \"Kibana\", \"versions\": [{\"status\": \"affected\", \"version\": \"8.19.11\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"8.19.20\"}, {\"status\": \"affected\", \"version\": \"9.3.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"9.4.5\"}, {\"status\": \"affected\", \"version\": \"9.5.0\", \"versionType\": \"semver\", \"lessThanOrEqual\": \"9.5.1\"}], \"defaultStatus\": \"unaffected\"}], \"references\": [{\"url\": \"https://discuss.elastic.co/t/kibana-8-19-21-9-4-6-9-5-2-security-update-esa-2026-142/390093\"}], \"x_generator\": {\"engine\": \"Elastic CVE Publisher 1.0.0\"}, \"descriptions\": [{\"lang\": \"en\", \"value\": \"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\u0027s private Elastic AI Assistant Knowledge Base entries.\", \"supportingMedia\": [{\"type\": \"text/html\", \"value\": \"\u003cp\u003eIncorrect 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\u0027s private Elastic AI Assistant Knowledge Base entries.\u003c/p\u003e\", \"base64\": false}]}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-863\", \"description\": \"CWE-863 Incorrect Authorization\"}]}], \"providerMetadata\": {\"orgId\": \"271b6943-45a9-4f3a-ab4e-976f3fa05b5a\", \"shortName\": \"elastic\", \"dateUpdated\": \"2026-09-01T19:20:37.599Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-78606\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-09-01T19:40:45.659Z\", \"dateReserved\": \"2026-08-24T21:13:52.890Z\", \"assignerOrgId\": \"271b6943-45a9-4f3a-ab4e-976f3fa05b5a\", \"datePublished\": \"2026-09-01T19:20:37.599Z\", \"assignerShortName\": \"elastic\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}



Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

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.