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CVE-2026-78584— Observable Response Discrepancy in Kibana Leading to Cross-Space Information Disclosure

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.

Elastic Kibana是荷兰Elastic公司开源的一个视觉化仪表板。 Elastic Kibana 9.4.0版本至9.4.3版本存在侧信道信息泄露漏洞，该漏洞源于可观察响应差异问题，可能导致持有Osquery实时查询权限的认证用户判断其无权访问的Kibana空间中是否存在计划查询标识符，造成信息泄露。

CVSS 4.3 · Medium EPSS 0.31% · P22

Possible ATT&CK Techniques 1 AI

T1070 · Indicator Removal

Affected Version Matrix 1

VendorProduct Version RangeStatus
Elastic Kibana 9.4.0≤ 9.4.3 affected
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I. Basic Information for CVE-2026-78584

Vulnerability Information
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Vulnerability Title
Observable Response Discrepancy in Kibana Leading to Cross-Space Information Disclosure
Source: CVE Program / CVE List V5
Vulnerability Description
Observable Response Discrepancy (CWE-204) in the Kibana Osquery feature can lead to information disclosure via Query System for Information (CAPEC-54). An authenticated user holding Osquery live-query privileges could determine whether a scheduled query identifier exists in a Kibana space they are not authorized to access.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
响应差异性信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Elastic Kibana 侧信道信息泄露漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Elastic Kibana是荷兰Elastic公司开源的一个视觉化仪表板。 Elastic Kibana 9.4.0版本至9.4.3版本存在侧信道信息泄露漏洞，该漏洞源于可观察响应差异问题，可能导致持有Osquery实时查询权限的认证用户判断其无权访问的Kibana空间中是否存在计划查询标识符，造成信息泄露。
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 Kibana 9.4.0 ~ 9.4.3 -

II. Public POCs for CVE-2026-78584

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III. Intelligence Information for CVE-2026-78584

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Vendor Advisories for CVE-2026-78584 (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-2026-78609 5.4 MEDIUM Incorrect Authorization in Elastic Cloud on Kubernetes Leading to Unauthorized Modificatio
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-2026-78600 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: Kibana
Same vendor: Elastic
Same weakness: CWE-204

V. Comments for CVE-2026-78584

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