Kibana 8.x < 8.19.18 / 9.0.x < 9.3.6 / 9.4.x < 9.4.3 Path Traversal (ESA-2026-158)

high Nessus Plugin ID 344321

Synopsis

The remote host is affected by a path traversal vulnerability.

Description

The version of Kibana installed on the remote host is 8.x prior to 8.19.18, or 9.0.x prior to 9.3.6, or 9.4.x prior to 9.4.3. It is, therefore, affected by a vulnerability as referenced in the ESA-2026-158 advisory.

- 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. (CVE-2026-78590)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Update to Kibana version 8.19.18, 9.3.6, 9.4.3 or later.

Plugin Details

Severity: High

ID: 344321

File Name: kibana_esa_2026_158.nasl

Version: 1.1

Type: Remote

Family: CGI abuses

Published: 9/9/2026

Updated: 9/9/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.45

CVSS v2

Risk Factor: High

Base Score: 8.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:C/A:C

CVSS Score Source: CVE-2026-78590

CVSS v3

Risk Factor: High

Base Score: 7.3

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:H/A:H

Vulnerability Information

CPE: cpe:/a:elasticsearch:kibana

Required KB Items: installed_sw/Kibana

Patch Publication Date: 9/1/2026

Vulnerability Publication Date: 9/1/2026

Reference Information

CVE: CVE-2026-78590

IAVB: 2026-B-0244

Detections

Analytics