Medium severity · published Sep 2, 2026
CVE-2026-78591
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Kibana Leading to Unauthorized Resource Deletion
6.3
CVSS
0.4%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:L
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
Required
Confidentiality
None
Integrity
High
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 30% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
KI
Kibana · Elastic
8.0.0 through 8.19.16; 9.0.0 through 9.3.5; 9.4.0 through 9.4.2 · source: vendor, NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-78591
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-78591
Vendor Advisory
https://discuss.elastic.co/t/kibana-8-19-17-9-3-6-9-4-3-security-update-esa-2026-159/390114
More from Kibana
10.0
CVE-2019-7609
Kibana Arbitrary Code Execution
9.9
CVE-2025-25015
Prototype pollution in Kibana leads to arbitrary code execution via a crafted file upload and specifically crafted HTTP requests
9.8
CVE-2025-25014
A Prototype pollution vulnerability in Kibana leads to arbitrary code execution via crafted HTTP requests to machine learning and reporting endpoints
9.8
CVE-2024-12556
Prototype Pollution in Kibana can lead to code injection via unrestricted file upload combined with path traversal
9.8
CVE-2018-17246
Kibana versions before 6.4.3 and 5.6.13 contain an arbitrary file inclusion flaw in the Console plugin