# CVE-2026-78600: Incomplete Cleanup in Elastic Cloud on Kubernetes Leading to Unauthorized Cross-Namespace Credential Retention

> CVE-2026-78600: Incomplete Cleanup in Elastic Cloud on Kubernetes Leading to Unauthorized Cross-Namespace Credential Retention. CVSS 3.5 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-78600
Last updated: 2026-09-03T19:15:08Z

- Published: 2026-09-02 14:43 UTC · Updated: 2026-09-03 19:15 UTC · Assigner: elastic
- CVSS: 3.5 (CVSS 3.1) · Severity: Low · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:N/A:N
- EPSS: 0.28%, 21th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-459

## Description

Incomplete Cleanup (CWE-459) in Elastic Cloud on Kubernetes (ECK) can lead to unauthorized access via Privilege Abuse (CAPEC-122). Authentication credentials persist after a cross-namespace association has been denied by RBAC enforcement, allowing a low-privileged tenant to retain unauthorized read access to the associated Elasticsearch cluster.

## Affected vendors and products

- Elastic: Eck Operator

## Tracked companies

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

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-78600)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-78600)
- [https://discuss.elastic.co/t/elastic-cloud-on-kubernetes-3-5-0-security-update-esa-2026-146/390106](https://discuss.elastic.co/t/elastic-cloud-on-kubernetes-3-5-0-security-update-esa-2026-146/390106)

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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-2026-78600 · Markdown: https://rewindex.com/cve/CVE-2026-78600.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-78600 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:06:20.290Z