CVE-2026-78590
Received Received - Intake

Path Traversal in Kibana Fleet Feature

Publication date: 2026-09-02

Last updated on: 2026-09-02

Assigner: Elastic

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 privileged resources via Path Traversal (CAPEC-126). A low-privileged user holding Fleet Settings write access could cause a subsequent administrative action to act on unintended internal resources, resulting in the deletion of privileged resources such as user accounts and other organizational assets. Exploitation requires an administrator to interact with the affected Fleet interface.

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Meta Information

Published
2026-09-02
Last Modified
2026-09-02
Generated
2026-09-02
AI Q&A
2026-09-02
EPSS Evaluated
N/A
NVD
CVE-2026-78590
EUVD
EUVD-2026-70061

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
elastic kibana *
elastic kibana to 8.19.18 (exc)
elastic kibana to 9.3.6 (exc)
elastic kibana to 9.4.3 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-22 The product 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 product 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.

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Executive Summary

CVE-2026-78590 is a Path Traversal vulnerability in Kibana's Fleet feature. It allows a low-privileged user with write access to manipulate file paths, causing administrative actions to target unintended internal resources. This can lead to unauthorized deletion of privileged resources like user accounts or organizational assets.

Detection Guidance

To detect this vulnerability, check if your Kibana instance is running a vulnerable version (8.19.17 or earlier, 9.3.5 or earlier, or 9.4.2 or earlier). Run commands like 'curl -X GET http://<kibana-host>:<port>/' to verify the version. Look for unauthorized deletions of privileged resources in logs or system changes.

Impact Analysis

If exploited, this vulnerability could allow deletion of critical resources such as user accounts or organizational assets. It requires a low-privileged user with Fleet Settings write access and an administrator to interact with the affected interface. The impact includes potential data loss and system disruption.

Mitigation Strategies

Upgrade Kibana to a patched version (8.19.18, 9.3.6, or 9.4.3) immediately. If upgrading is not possible, restrict access to Fleet Settings write permissions for low-privileged users. Monitor administrative actions for suspicious deletions of privileged resources.

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