Kibana Fleet Path Traversal leads to unauthorized deletion
CVE-2026-78591 Published on September 2, 2026
Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Kibana Leading to Unauthorized Resource Deletion
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.
Vulnerability Analysis
CVE-2026-78591 can be exploited with network access, requires user interaction and a small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have no impact on confidentiality, a high impact on integrity, and a small impact on availability.
Weakness Type
What is a Directory traversal Vulnerability?
The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
CVE-2026-78591 has been classified to as a Directory traversal vulnerability or weakness.
Products Associated with CVE-2026-78591
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Affected Versions
Elastic Kibana:- Version 8.0.0, <= 8.19.16 is affected.
- Version 9.0.0, <= 9.3.5 is affected.
- Version 9.4.0, <= 9.4.2 is affected.