Elasticsearch 8.x < 8.19.15 / 9.0.x < 9.2.9 / 9.3.x < 9.3.4 DoS (ESA-2026-60)

medium Nessus Plugin ID 330340

Synopsis

The remote host is missing a security update.

Description

The version of Elasticsearch installed on the remote host is 8.x prior to 8.19.15, or 9.0.x prior to 9.2.9, or 9.3.x prior to 9.3.4. It is, therefore, affected by a vulnerability as referenced in the ESA-2026-60 advisory.

- Uncontrolled Resource Consumption (CWE-400) in Elasticsearch can lead to denial of service via Excessive Allocation (CAPEC-130). A user with search privileges can submit a specially crafted search request that causes a data node to exhaust available heap memory, resulting in node unavailability and cluster degradation. An attacker could leverage this vulnerability to cause cluster downtime requiring manual intervention to restore service. (CVE-2026-63136)

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 8.19.15, 9.2.9, or 9.3.4 or later as appropriate for your release branch.

Plugin Details

Severity: Medium

ID: 330340

File Name: elasticsearch_ESA-2026-60.nasl

Version: 1.1

Type: Combined

Agent: unix

Family: Misc.

Published: 7/28/2026

Updated: 7/28/2026

Configuration: Enable thorough checks (optional)

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3

Percentile: 23.75

CVSS v2

Risk Factor: Medium

Base Score: 6.8

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

CVSS Score Source: CVE-2026-63136

CVSS v3

Risk Factor: Medium

Base Score: 6.5

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

Vulnerability Information

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

Required KB Items: installed_sw/Elasticsearch

Patch Publication Date: 7/21/2026

Vulnerability Publication Date: 7/21/2026

Reference Information

CVE: CVE-2026-63136

IAVA: 2026-A-0760

Detections

Analytics