# CVE-2026-78603: Missing Authorization in Kibana Leading to Unauthorized Disclosure of Fleet Deployment Metadata

> CVE-2026-78603: Missing Authorization in Kibana Leading to Unauthorized Disclosure of Fleet Deployment Metadata. CVSS 4.3 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-78603
Last updated: 2026-09-02T14:52:43Z

- Published: 2026-09-01 19:20 UTC · Updated: 2026-09-02 14:52 UTC · Assigner: elastic
- CVSS: 4.3 (CVSS 3.1) · Severity: Medium · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
- EPSS: 0.29%, 21th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-862

## Description

Missing Authorization (CWE-862) in Kibana can lead to information disclosure via Exploiting Incorrectly Configured Access Control Security Levels (CAPEC-180). An authenticated user holding minimal Elasticsearch privileges could bypass Kibana feature authorization and space access controls, resulting in the unauthorized disclosure of Fleet deployment metadata from the default Kibana space.

## Affected vendors and products

- Elastic: Kibana

## Tracked companies

- [Elastic Cloud](https://rewindex.com/company/elastic-cloud.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-78603)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-78603)
- [https://discuss.elastic.co/t/kibana-9-4-6-9-5-1-security-update-esa-2026-149/390069](https://discuss.elastic.co/t/kibana-9-4-6-9-5-1-security-update-esa-2026-149/390069)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-78603 · Markdown: https://rewindex.com/cve/CVE-2026-78603.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-78603 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:12:58.889Z