Kibana 9.0.x < 9.4.7 / 9.5.x < 9.5.4 Incorrect Authorization (ESA-2026-187)

high Nessus Plugin ID 363428

Synopsis

The remote host is affected by an incorrect authorization vulnerability.

Description

The version of Kibana installed on the remote host is 9.0.x prior to 9.4.7, or 9.5.x prior to 9.5.4. It is, therefore, affected by a vulnerability as referenced in the ESA-2026-187 advisory.

- Authorization Bypass Through User-Controlled Key (CWE-639) in Kibana could lead to cross-tenant data interception. In this context, tenant refers to a user or team sharing the same Kibana deployment, not a separate Elastic Cloud organization or customer. Kibana's Fleet package installation process allowed a user holding delegated Fleet package-management privileges, without direct Elasticsearch administrative privileges, to claim a data stream identifier already in use by another tenant. Because ownership of that identifier was not verified before Fleet applied the uploaded package's generated index and ingest- pipeline settings to already-existing infrastructure, an attacker could redirect an existing tenant's data stream through infrastructure under their control. This exposed the affected tenant's subsequently ingested data to unauthorized disclosure and modification, and prevented that data from reaching its intended destination. Interception could continue even after the malicious package was removed, requiring separate remediation of the affected infrastructure. (CVE-2026-102406)

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

Solution

Upgrade to Kibana version 9.4.7, or 9.5.4 or later as appropriate for your release branch.

Plugin Details

Severity: High

ID: 363428

File Name: kibana_esa_2026_187.nasl

Version: 1.1

Type: Remote

Family: CGI abuses

Published: 10/6/2026

Updated: 10/6/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.41

CVSS v2

Risk Factor: High

Base Score: 9

Temporal Score: 6.7

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

CVSS Score Source: CVE-2026-102406

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:elasticsearch:kibana

Required KB Items: installed_sw/Kibana

Exploit Ease: No known exploits are available

Patch Publication Date: 10/6/2026

Vulnerability Publication Date: 10/6/2026

Reference Information

CVE: CVE-2026-102406

Detections

Analytics