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

Quick assessment

Affected
Elastic Eck Operator
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Elastic Eck Operator是荷兰Elastic公司的一个管理Kubernetes搜索集群的控制器。 Elastic Eck Operator 2.6.0版本至3.4.1版本存在授权问题漏洞，该漏洞源于授权不正确，具有单个命名空间受限Kubernetes权限的攻击者可通过元数据欺骗，将攻击者控制的证书材料包含到另一个命名空间中由ECK管理的Elasticsearch客户端信任捆绑包中，导致未授权修改数据。

CVSS 5.4 · Medium EPSS 0.15% · P4

Affected Version Matrix 1

VendorProduct Version RangeStatus
Elastic Eck Operator 2.6.0≤ 3.4.1 affected
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I. Basic Information for CVE-2026-78609

Vulnerability Information
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Vulnerability Title
Incorrect Authorization in Elastic Cloud on Kubernetes Leading to Unauthorized Modification of Data
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5
Vulnerability Title
Elastic Eck Operator 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Elastic Eck Operator是荷兰Elastic公司的一个管理Kubernetes搜索集群的控制器。 Elastic Eck Operator 2.6.0版本至3.4.1版本存在授权问题漏洞，该漏洞源于授权不正确，具有单个命名空间受限Kubernetes权限的攻击者可通过元数据欺骗，将攻击者控制的证书材料包含到另一个命名空间中由ECK管理的Elasticsearch客户端信任捆绑包中，导致未授权修改数据。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Elastic Eck Operator 2.6.0 ~ 3.4.1 -

II. Public POCs for CVE-2026-78609

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III. Intelligence Information for CVE-2026-78609

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Vendor Advisories for CVE-2026-78609 (1)

Same Patch Batch · Elastic · 2026-09-02 · 15 CVEs total

CVE-2026-78604 7.8 HIGH Incorrect Permission Assignment for Critical Resource in Elastic Agent Leading to Local Pr
CVE-2026-78590 7.3 HIGH Improper Limitation of a Pathname to a Restricted Directory in Kibana Leading to Unauthori
CVE-2026-78588 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in Filebeat Leading to Denial of Serv
CVE-2026-78586 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in Kibana Leading to Denial of Servic
CVE-2026-78599 6.5 MEDIUM Stored Path Traversal in Kibana Leading to Unauthorized Deletion of Internal Resources
CVE-2026-78591 6.3 MEDIUM Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Kibana L
CVE-2026-78601 5.5 MEDIUM Missing Authorization in Kibana Leading to Unauthorized Elasticsearch Index Data Exposure
CVE-2026-78598 5.4 MEDIUM Incorrect Authorization in Kibana Leading to Unauthorized Cross-Space Exposure of Machine
CVE-2026-78602 5.3 MEDIUM Improper Limitation of a Pathname to a Restricted Directory in Elastic Maps Server Leading
CVE-2026-78594 4.9 MEDIUM Improper Handling of Highly Compressed Data in APM Server Leading to Persistent Denial of
CVE-2026-82293 4.3 MEDIUM Incorrect Authorization in Kibana Leading to Unauthorized Resource Consumption
CVE-2026-78584 4.3 MEDIUM Observable Response Discrepancy in Kibana Leading to Cross-Space Information Disclosure
CVE-2026-78600 3.5 LOW Incomplete Cleanup in Elastic Cloud on Kubernetes Leading to Unauthorized Cross-Namespace
CVE-2026-78587 3.1 LOW Incorrect Authorization in Fleet Server Leading to Denial of Service of Agent Upload Opera

IV. Related Vulnerabilities

Same product: Eck Operator
Same vendor: Elastic
Same weakness: CWE-863

V. Comments for CVE-2026-78609

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