Unprotected storage of credentials in Splunk Enterprise - CVE-2026-20138
Published: February 19, 2026
Vulnerability identifier: #VU123096
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:N/SC:H/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2026-20138
CWE-ID: CWE-256
Exploitation vector: Adjecent network
Exploit availability:
No public exploit available
Vendor: Splunk Inc.
Affected software:
Splunk Enterprise
Splunk Enterprise
Detailed vulnerability description
The vulnerability allows a remote user to gain access to other users' credentials.
The vulnerability exists due to application stored credentials in plain text. A remote user of a Splunk Search Head Cluster (SHC) deployment who holds a role with access to the Splunk _internal index can view in plain text the integrationKey, secretKey, and appSecretKey secrets, generated by Duo Two-Factor Authentication for Splunk Enterprise.
How to mitigate CVE-2026-20138
Install updates from vendor's website.