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CVE-2026-78591— Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Kibana Leading to Unauthorized Resource Deletion

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 8.0.0版本至8.19.16版本、9.0.0版本至9.3.5版本和9.4.0版本至9.4.2版本存在路径遍历漏洞，该漏洞源于Kibana Fleet功能未能正确限制受限目录的路径名，存在路径遍历漏洞，可能导致低权限用户通过Fleet管理界面使高权限用户的后续操作作用于非预期目标，从而未授权删除资源，包括具有高权限的账户。

CVSS 6.3 · Medium EPSS 0.36% · P28

Possible ATT&CK Techniques 1 AI

T1079

Affected Version Matrix 3

VendorProduct Version RangeStatus
Elastic Kibana 8.0.0≤ 8.19.16 affected
9.0.0≤ 9.3.5 affected
9.4.0≤ 9.4.2 affected
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I. Basic Information for CVE-2026-78591

Vulnerability Information
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Vulnerability Title
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Kibana Leading to Unauthorized Resource Deletion
Source: CVE Program / CVE List V5
Vulnerability Description
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') (CWE-22) in the Kibana Fleet feature can lead to the unauthorized deletion of resources via Path Traversal (CAPEC-126). A low-privileged user could cause a subsequent action taken by a higher-privileged user in the Fleet administration interface to act on an unintended target, resulting in the deletion of resources including accounts with elevated privileges.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
Elastic Kibana 路径遍历漏洞
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 8.0.0版本至8.19.16版本、9.0.0版本至9.3.5版本和9.4.0版本至9.4.2版本存在路径遍历漏洞，该漏洞源于Kibana Fleet功能未能正确限制受限目录的路径名，存在路径遍历漏洞，可能导致低权限用户通过Fleet管理界面使高权限用户的后续操作作用于非预期目标，从而未授权删除资源，包括具有高权限的账户。
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 8.0.0 ~ 8.19.16 -

II. Public POCs for CVE-2026-78591

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III. Intelligence Information for CVE-2026-78591

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Vendor Advisories for CVE-2026-78591 (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-2026-78601 5.5 MEDIUM Missing Authorization in Kibana Leading to Unauthorized Elasticsearch Index Data Exposure
CVE-2026-78609 5.4 MEDIUM Incorrect Authorization in Elastic Cloud on Kubernetes Leading to Unauthorized Modificatio
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: Kibana
Same vendor: Elastic
Same weakness: CWE-22

V. Comments for CVE-2026-78591

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