Vulnerability-Lookup

Vulnerability from bitnami_vulndb

Published

2026-08-19 08:40

Modified

2026-09-08 08:34

Summary

Incorrect Authorization in Kibana Agent Builder Leading to Disclosure and Tampering of Private Agents

Details

Kibana Agent Builder determines whether a caller owns a private agent by comparing a stable user identifier when one is recorded, and falling back to a comparison of the username when it is not. A username is not unique across Elasticsearch authentication realms, so two distinct principals that share a username in different realms are treated as the same owner. This discloses the configuration and instructions of an agent the caller does not own, and allows that agent to be altered or removed.

JSON

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{
  "affected": [
    {
      "package": {
        "ecosystem": "Bitnami",
        "name": "elk",
        "purl": "pkg:bitnami/elk"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "9.4.0"
            },
            {
              "fixed": "9.4.5"
            },
            {
              "introduced": "9.5.0"
            },
            {
              "fixed": "9.5.1"
            }
          ],
          "type": "SEMVER"
        }
      ],
      "severity": [
        {
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N",
          "type": "CVSS_V3"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2026-72643"
  ],
  "database_specific": {
    "cpes": [
      "cpe:2.3:a:elasticsearch:kibana:*:*:*:*:*:node.js:*:*"
    ],
    "severity": "High"
  },
  "details": "Kibana Agent Builder determines whether a caller owns a private agent by comparing a stable user identifier when one is recorded, and falling back to a comparison of the username when it is not. A username is not unique across Elasticsearch authentication realms, so two distinct principals that share a username in different realms are treated as the same owner. This discloses the configuration and instructions of an agent the caller does not own, and allows that agent to be altered or removed.",
  "id": "BIT-elk-2026-72643",
  "modified": "2026-09-08T08:34:36.952Z",
  "published": "2026-08-19T08:40:23.024Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://discuss.elastic.co/t/kibana-9-4-5-9-5-1-security-update-esa-2026-124/389538"
    },
    {
      "type": "WEB",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-72643"
    }
  ],
  "schema_version": "1.6.2",
  "summary": "Incorrect Authorization in Kibana Agent Builder Leading to Disclosure and Tampering of Private Agents"
}

CVE-2026-72643 (GCVE-0-2026-72643)

Vulnerability from cvelistv5 – Published: 2026-08-13 19:13 – Updated: 2026-08-13 20:27

Title

Incorrect Authorization in Kibana Agent Builder Leading to Disclosure and Tampering of Private Agents

Summary

Severity

7.1 (High)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-13 19:34 UTC

CWE

CWE-863 - Incorrect Authorization

Assigner

elastic mitre root

References

1 reference

URL	Tags
https://discuss.elastic.co/t/kibana-9-4-5-9-5-1-s…

Impacted products

1 product

Vendor	Product	Version
Elastic	Kibana	Affected: 9.4.0 , ≤ 9.4.4 (semver) Affected: 9.5.0 (semver)

Show details on NVD website

JSON

To clipboard

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    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-72643",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "partial"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-13T19:34:08.510307Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-13T20:27:50.500Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "defaultStatus": "unaffected",
          "product": "Kibana",
          "vendor": "Elastic",
          "versions": [
            {
              "lessThanOrEqual": "9.4.4",
              "status": "affected",
              "version": "9.4.0",
              "versionType": "semver"
            },
            {
              "status": "affected",
              "version": "9.5.0",
              "versionType": "semver"
            }
          ]
        }
      ],
      "descriptions": [
        {
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          "supportingMedia": [
            {
              "base64": false,
              "type": "text/html",
              "value": "\u003cp\u003eKibana Agent Builder determines whether a caller owns a private agent by comparing a stable user identifier when one is recorded, and falling back to a comparison of the username when it is not. A username is not unique across Elasticsearch authentication realms, so two distinct principals that share a username in different realms are treated as the same owner. This discloses the configuration and instructions of an agent the caller does not own, and allows that agent to be altered or removed.\u003c/p\u003e"
            }
          ],
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        }
      ],
      "metrics": [
        {
          "cvssV3_1": {
            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
            "availabilityImpact": "NONE",
            "baseScore": 7.1,
            "baseSeverity": "HIGH",
            "confidentialityImpact": "HIGH",
            "integrityImpact": "LOW",
            "privilegesRequired": "LOW",
            "scope": "UNCHANGED",
            "userInteraction": "NONE",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N",
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      "problemTypes": [
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      "providerMetadata": {
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        "orgId": "271b6943-45a9-4f3a-ab4e-976f3fa05b5a",
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        }
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      },
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  "cveMetadata": {
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    "assignerShortName": "elastic",
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    "datePublished": "2026-08-13T19:13:47.787Z",
    "dateReserved": "2026-08-10T11:17:35.480Z",
    "dateUpdated": "2026-08-13T20:27:50.500Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.