CVE-2026-72640

The Elastic Cloud on Kubernetes (ECK) operator reads a list of secret references from an annotation on secrets it manages, and it accepts the namespace recorded in each reference without validating that the reference is authorized for the resource being reconciled. A user whose Kubernetes permissions are limited to their own namespace can write that annotation, trigger a reconcile, and cause the operator to use its cluster-wide secret permissions to copy the contents of a secret from any other namespace into a secret the user can read.

CVSS v3 6.5 MEDIUM

6.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://discuss.elastic.co/t/elastic-cloud-on-kubernetes-3-5-0-security-update-esa-2026-121/389494	Vendor Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:elastic:elastic_cloud_on_kubernetes:*:*:*:*:*:*:*:*

History

No history.

Information

Published : 2026-08-13 20:17

Updated : 2026-09-03 18:54

NVD link : CVE-2026-72640

Mitre link : CVE-2026-72640

CVE.ORG link : CVE-2026-72640

JSON object : View

Products Affected

elastic

elastic_cloud_on_kubernetes

CWE

CWE-441

Unintended Proxy or Intermediary ('Confused Deputy')

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