CVE-2026-78609 — Incorrect Authorization in Elastic Cloud on Kubernetes Leading to Unauthorized Modification of Data

CVE-2026-78609

Incorrect Authorization in Elastic Cloud on Kubernetes Leading to Unauthorized Modification of Data PUBLISHED

Description (CNA)

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.

Affected (CNA)

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

CWE

CWE-863

References

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

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.