Detections
Analytics
Elasticsearch 8.0.x < 8.19.17 / 9.0.x < 9.3.6 / 9.4.x < 9.4.3 Multiple DoS
medium Nessus Plugin ID 324974
Synopsis
The remote host is affected by multiple denial of service vulnerabilities.Description
The version of Elasticsearch installed on the remote host is 8.0 prior to 8.19.17, 9.0 prior to 9.3.6, or 9.4.0 prior to 9.4.3. It is, therefore, affected by multiple denial of service vulnerabilities:- Uncontrolled recursion in Elasticsearch allows an authenticated user to submit a specially crafted query that causes excessive resource consumption while the request is processed, which may render the affected node unavailable.
(CVE-2026-56148)
- Allocation of resources without limits or throttling in Elasticsearch allows a user with elevated privileges to submit a specially crafted machine learning request that causes excessive memory consumption, which may render the affected node unavailable. (CVE-2026-56149)
Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.
Solution
Upgrade to Elasticsearch version 8.19.17, 9.3.6, or 9.4.3 or later as appropriate for your release branch.See Also
Plugin Details
Severity: Medium
ID: 324974
File Name: elasticsearch_9_4_3.nasl
Version: 1.1
Type: Combined
Agent: unix
Family: Misc.
Published: 7/3/2026
Updated: 7/3/2026
Configuration: Enable thorough checks (optional)
Supported Sensors: Nessus Agent, Nessus
Risk Information
VPR
Risk Factor: Low
Score: 3
Percentile: 23.72
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-2026-56148
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: 7/1/2026
Vulnerability Publication Date: 7/1/2026
Reference Information
CVE: CVE-2026-56148, CVE-2026-56149