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CVE-2026-78606— Incorrect Authorization in Kibana Leading to Unauthorized Disclosure, Modification, and Deletion of Data

Quick assessment

Affected
Elastic Kibana
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.

Kibana 中存在授权错误（CWE-863），可能导致数据被未授权地读取、修改和删除，原因是访问功能未通过 ACL 正确约束（CAPEC-1）。当来自不同认证域的两个已认证主体拥有相同的用户名时，其中一个主体可以读取、修改和删除另一个主体的私有 Elastic AI 助手知识库条目。

CVSS 4.2 · Medium

Possible ATT&CK Techniques 1 AI

T1576.002

Affected Version Matrix 3

VendorProduct Version RangeStatus
Elastic Kibana 8.19.11≤ 8.19.20 affected
9.3.0≤ 9.4.5 affected
9.5.0≤ 9.5.1 affected
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I. Basic Information for CVE-2026-78606

Vulnerability Information
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Vulnerability Title
Incorrect Authorization in Kibana Leading to Unauthorized Disclosure, Modification, and Deletion of Data
Source: CVE Program / CVE List V5
Vulnerability Description
Incorrect Authorization (CWE-863) in Kibana can lead to unauthorized disclosure, modification, and deletion of data via Accessing Functionality Not Properly Constrained by ACLs (CAPEC-1). Where two authenticated principals originating from different authentication realms share the same username value, one could read, modify, and delete the other's private Elastic AI Assistant Knowledge Base entries.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/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

Affected Products

Vendor Product Affected Versions CPE Subscribe
Elastic Kibana 8.19.11 ~ 8.19.20 -

II. Public POCs for CVE-2026-78606

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III. Intelligence Information for CVE-2026-78606

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Other References for CVE-2026-78606 (1)

Same Patch Batch · Elastic · 2026-09-01 · 20 CVEs total

CVE-2026-72649 8.8 HIGH Deserialization of Untrusted Data in Elasticsearch Leading to Remote Code Execution
CVE-2026-63137 8.3 HIGH Incorrect Authorization in Kibana Leading to Privilege Escalation
CVE-2026-78592 7.3 HIGH Improper Limitation of a Pathname to a Restricted Directory in Kibana Leading to Unauthori
CVE-2024-14047 7.2 HIGH Improper Link Resolution Before File Access ('Link Following') in Winlogbeat Leading to Ar
CVE-2026-78608 6.5 MEDIUM Missing Authorization in Kibana Leading to Information Disclosure
CVE-2026-33465 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in Kibana Leading to Denial of Servic
CVE-2026-63138 6.5 MEDIUM Improper Neutralization of Special Elements in Data Query Logic in Kibana Leading to Infor
CVE-2026-72654 6.5 MEDIUM Execution with Unnecessary Privileges in Kibana Leading to Information Disclosure
CVE-2026-72628 6.5 MEDIUM Improper Handling of Highly Compressed Data in Kibana Leading to Denial of Service
CVE-2026-72652 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in Kibana Leading to Denial of Servic
CVE-2026-72644 6.5 MEDIUM Uncaught Exception in Kibana Leading to Denial of Service
CVE-2026-72682 6.5 MEDIUM Allocation of Resources Without Limits or Throttling in Kibana Leading to Denial of Servic
CVE-2026-78605 5.9 MEDIUM Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') in Elasticsearch L
CVE-2026-78607 5.4 MEDIUM Missing Authorization in Elasticsearch Leading to Information Disclosure
CVE-2026-72641 5.4 MEDIUM Incorrect Authorization in Kibana Leading to Unauthorized Modification of Data
CVE-2026-56143 4.9 MEDIUM Allocation of Resources Without Limits or Throttling in Elasticsearch Leading to Denial of
CVE-2026-72633 4.3 MEDIUM Incorrect Authorization in Kibana Leading to Unauthorized Disabling of Privilege Monitorin
CVE-2026-78603 4.3 MEDIUM Missing Authorization in Kibana Leading to Unauthorized Disclosure of Fleet Deployment Met
CVE-2026-78597 4.3 MEDIUM Missing Authorization in Kibana Entity Store Leading to Unauthorized API Key Creation

IV. Related Vulnerabilities

Same product: Kibana
Same vendor: Elastic
Same weakness: CWE-863

V. Comments for CVE-2026-78606

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