CVE-2026-78599: Elastic Kibana

Medium severity, CVSS 6.5. EPSS: 0.5% chance of exploitation in the next 30 days.

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 internal resources via Path Traversal (CAPEC-126). A low-privileged user holding Fleet write access could cause a subsequent administrative delete action to act on unintended internal resources. Exploitation requires an administrator to interact with the affected Fleet interface.

Affected products

• Elastic Kibana: from 8.0.0, before 8.19.18 (fixed in 8.19.18); from 9.0.0, before 9.4.3 (fixed in 9.4.3)

Published 2026-09-02. Last modified 2026-09-03.