Vulnerability · Published Sep 2, 2026 · Assigned by elastic
CVE-2026-78609Incorrect Authorization in Elastic Cloud on Kubernetes Leading to Unauthorized Modification of Data
Medium 5.4
In plain English
A medium-severity incorrect authorization in Eck Operator from Elastic. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 4% of all known vulnerabilities).
Official 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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Elastic | Eck Operator | 2.6.0 – through 3.4.1 |
Weakness: CWE-863 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N