Kibana 9.3.x < 9.3.7 / 9.4.x < 9.4.4 DoS (ESA-2026-55)

medium Nessus Plugin ID 330368

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Synopsis

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

Description

The version of Kibana installed on the remote host is 9.3.x prior to 9.3.7 or 9.4.x prior to 9.4.4. It is, therefore, affected by a vulnerability as referenced in the ESA-2026-55 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 can submit a specially crafted request to affected Entity Analytics endpoints containing an oversized input value that causes excessive resource consumption, which may render Kibana unavailable. (CVE-2026-42397)

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 9.3.7, 9.4.4 or later.

Plugin Details

Severity: Medium

ID: 330368

File Name: kibana_esa_2026_55.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

Percentile: 23.75

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-2026-42397

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: 7/21/2026

Vulnerability Publication Date: 7/21/2026

Reference Information

CVE: CVE-2026-42397

IAVB: 2026-B-0199

Detections

Analytics