CVE-2026-20138

Severity CVSS v4.0:

Pending analysis

Type:

CWE-532 Information Exposure Through Log Files

Publication date:

18/02/2026

Last modified:

20/02/2026

Description

In Splunk Enterprise versions below 10.2.0, 10.0.2, 9.4.7, 9.3.9, and 9.2.11, a user of a Splunk Search Head Cluster (SHC) deployment who holds a role with access to the Splunk `_internal` index could view the `integrationKey`, `secretKey`, and `appSecretKey` secrets, generated by [Duo Two-Factor Authentication for Splunk Enterprise](https://duo.com/docs/splunk), in plain text.

Impact

Vector 3.x

CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H CVSS v3.1 Severity and Metrics:

Base Score: 6.80 MEDIUM
Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector (AV): Adjacent
Attack Complexity (AC): Low
Privileges Required (PR): High
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): High
Integrity (I): High
Availability (A): High

Base Score 3.x

6.80

Severity 3.x

MEDIUM

Vulnerable products and versions

CPE	From	Up to
cpe:2.3:a:splunk:splunk:::::enterprise:::*	9.2.0 (including)	9.2.11 (excluding)
cpe:2.3:a:splunk:splunk:::::enterprise:::*	9.3.0 (including)	9.3.9 (excluding)
cpe:2.3:a:splunk:splunk:::::enterprise:::*	9.4.0 (including)	9.4.7 (excluding)
cpe:2.3:a:splunk:splunk:::::enterprise:::*	10.0.0 (including)	10.0.2 (excluding)

To consult the complete list of CPE names with products and versions, see this page

References to Advisories, Solutions, and Tools

https://advisory.splunk.com/advisories/SVD-2026-0203