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 PUBLISHED

Description (CNA)

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 (CNA)

Vendor / product	Versions
Elastic / Eck Operator	affected 2.6.0 through 3.4.1

CWE

CWE-459

References

https://discuss.elastic.co/t/elastic-cloud-on-kubernetes-3-5-0-security-update-esa-2026-146/390106

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.