CVE-2026-78600

3.5 lowEPSS 0.3%

Low (3.5) in elastic elastic cloud on kubernetes. EPSS 0.3% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

3.5 low

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

EPSS: 0.3% chance of exploitation in the next 30 days; higher than 20% of CVEs (scores of 2026-10-31)
CWE: CWE-459
Published: 2026-09-02
Modified: 2026-09-03
Record from: the NVD, synced 2026-10-19

Affected

elastic:elastic_cloud_on_kubernetes

References

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

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