CVE-2026-78609
Medium
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.
SeverityMedium
CVSS5.4
Exploit probability4. percentile0.2%
ProductElastic Cloud On Kubernetes
PublishedSep 2, 2026
First seenSep 2, 2026
Weakness typeCWE-863Incorrect authorization
How to fix
Update
- elastic elastic_cloud_on_kubernetes3.5.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| elastic elastic_cloud_on_kubernetes | 2.6.0 ≤ v < 3.5.0 | 3.5.0 |
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