Kibana 8.7.0 < 8.19.18 / 9.0.x < 9.3.7 / 9.4.x < 9.4.3 Authorization Bypass (ESA-2026-59)

high Nessus Plugin ID 330370

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Synopsis

The remote host is affected by an authorization bypass vulnerability.

Description

The version of Kibana installed on the remote host is 8.7.0 prior to 8.19.18, or 9.3.x prior to 9.3.7, or 9.4.x prior to 9.4.3. It is, therefore, affected by a vulnerability as referenced in the ESA-2026-59 advisory.

- Authorization Bypass Through User-Controlled Key (CWE-639) in Kibana can lead to unauthorized information disclosure and case attachment integrity compromise via Privilege Abuse (CAPEC-122). An inconsistency in Kibana's file access authorization logic allows a low-privileged authenticated user to retrieve, modify, and delete case attachments that belong to feature areas they are not authorized to access. Because the access control check and the resource retrieval use different resolution mechanisms, an authenticated attacker with limited file management permissions can obtain the contents of, modify, or delete protected case attachments - such as those associated with Security Solution cases - without holding the privileges required to access those features. (CVE-2026-56147)

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, 9.3.7, 9.4.3 or later.

Plugin Details

Severity: High

ID: 330370

File Name: kibana_esa_2026_59.nasl

Version: 1.2

Type: Remote

Family: CGI abuses

Published: 7/28/2026

Updated: 7/29/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 51.9

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2026-56147

CVSS v3

Risk Factor: High

Base Score: 7.1

Temporal Score: 6.2

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

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: 7/21/2026

Vulnerability Publication Date: 7/21/2026

Reference Information

CVE: CVE-2026-56147

IAVB: 2026-B-0199

Detections

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