SB2026021961 - Two information disclosure vulnerabilities in Splunk Enterprise

Description

This security bulletin contains information about 2 vulnerabilities.

1) Unprotected storage of credentials (CVE-ID: CVE-2026-20138)

CWE-ID: CWE-256 - Unprotected Storage of Credentials

CVSSv4: 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

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.

2) Cleartext storage of sensitive information (CVE-ID: CVE-2026-20142)

CWE-ID: CWE-312 - Cleartext Storage of Sensitive Information

CVSSv4: CVSS:4.0/AV:A/AC:L/AT:N/PR:H/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote user to gain access to sensitive information.

The vulnerability exists due to application stores sensitive information in configuration files. 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 RSA accessKey value from the Authentication.conf file.

Remediation

Install update from vendor's website.

References

• https://advisory.splunk.com/advisories/SVD-2026-0203
• https://advisory.splunk.com/advisories/SVD-2026-0207