Detections
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Elasticsearch 9.2.x < 9.4.7 / 9.5.x < 9.5.4 DoS (ESA-2026-182)

medium Nessus Plugin ID 351493

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Synopsis

The remote host is missing a security update.

Description

The version of Elasticsearch installed on the remote host is 9.2.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-2026-182 advisory.

 - Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead denial of service via Excessive Allocation (CAPEC-130) (CVE-2026-94396)

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 Elasticsearch version 9.4.7, or 9.5.4 or later as appropriate for your release branch.

See Also

https://discuss.elastic.co/t/390686

Plugin Details

Severity: Medium

ID: 351493

File Name: elasticsearch_esa_2026_182.nasl

Version: 1.1

Type: Combined

Agent: unix

Family: Misc.

Published: 9/30/2026

Updated: 9/30/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.61

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-2026-94396

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:elastic:elasticsearch, cpe:/a:elasticsearch:elasticsearch

Required KB Items: installed_sw/Elasticsearch

Exploit Ease: No known exploits are available

Patch Publication Date: 9/25/2026

Vulnerability Publication Date: 9/25/2026

Reference Information

CVE: CVE-2026-94396