CVE-2026-78609

MediumCVSS 5.4/10Last modified Sep 4, 2026

Description

Incorrect Authorization (CWE-863) in Elastic Cloud on Kubernetes (ECK) can lead to unauthorized modification of data via Metadata Spoofing (CAPEC-690). An actor holding limited Kubernetes permissions confined to a single namespace could cause attacker-controlled certificate material to be included in the Elasticsearch client trust bundle managed by ECK in a separate namespace.

Metrics

CVSS 3.1 5.4/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

Weakness enumeration

CWE-863

Affected software

Vendor	Product	Versions
Elastic	Eck Operator	>= 2.6.0, <= 3.4.1

References

https://discuss.elastic.co/t/elastic-cloud-on-kubernetes-3-5-0-security-update-esa-2026-145/390105Vendor Advisory

Timeline

Published: Sep 2, 2026
Last modified: Sep 4, 2026
NVD status: Analyzed

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