Kibana 8.x < 8.19.16 / 9.0.x < 9.3.5 / 9.4.x < 9.4.2 DoS (ESA-2026-163)

medium Nessus Plugin ID 344318

Synopsis

The remote host is affected by a denial of service vulnerability.

Description

The version of Kibana installed on the remote host is 8.x prior to 8.19.16, or 9.0.x prior to 9.3.5, or 9.4.x prior to 9.4.2. It is, therefore, affected by a vulnerability as referenced in the ESA-2026-163 advisory.

- Allocation of Resources Without Limits or Throttling (CWE-770) in Kibana can lead to a denial of service via Excessive Allocation (CAPEC-130). An authenticated user with low-level privileges could submit a specially crafted request that causes Kibana to consume an unbounded amount of memory, rendering it unavailable to all users. (CVE-2026-78586)

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 8.19.16, 9.3.5, 9.4.2 or later.

Plugin Details

Severity: Medium

ID: 344318

File Name: kibana_esa_2026_163.nasl

Version: 1.2

Type: Remote

Family: CGI abuses

Published: 9/9/2026

Updated: 9/10/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.64

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

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

CVSS Score Source: CVE-2026-78586

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/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: 9/1/2026

Vulnerability Publication Date: 9/1/2026

Reference Information

CVE: CVE-2026-78586

IAVB: 2026-B-0244

Detections

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