Detections
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Splunk Enterprise 9.3.0 < 9.3.9, 9.4.0 < 9.4.8, 10.0.0 < 10.0.3 (SVD-2026-0208)

high Nessus Plugin ID 299605

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Synopsis

An application running on a remote web server host is affected by a vulnerability

Description

The version of Splunk installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the SVD-2026-0208 advisory.

 - In Splunk Enterprise for Windows versions below 10.2.0, 10.0.3, 9.4.8, and 9.3.9, a lowprivileged Windows user that can create a directory on the system drive where Splunk Enterprise is installed can write a malicious Python script into that directory. This could result in a Local Privilege Escalation (LPE) and a Denial of Service (DoS), as the malicious Python script might run with system level privileges when the Splunk Enterprise instance restarts. (CVE-2026-20143)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Upgrade Splunk Enterprise to versions 10.2.0, 10.0.3, 9.4.8, 9.3.9 or higher.

See Also

https://advisory.splunk.com/advisories/SVD-2026-0208.html

Plugin Details

Severity: High

ID: 299605

File Name: splunk_1003_cve-2026-20143.nasl

Version: 1.1

Type: combined

Agent: windows, macosx, unix

Family: CGI abuses

Published: 2/19/2026

Updated: 2/19/2026

Configuration: Enable paranoid mode

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.2

CVSS v2

Risk Factor: Medium

Base Score: 6.2

Temporal Score: 4.6

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

CVSS Score Source: CVE-2026-20143

CVSS v3

Risk Factor: High

Base Score: 7.7

Temporal Score: 6.7

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:splunk:splunk

Required KB Items: installed_sw/Splunk, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 2/18/2026

Vulnerability Publication Date: 2/18/2026

Reference Information

CVE: CVE-2026-20143

CWE: 427