CVE-2026-20138

Sensitive Information Disclosure in "_internal" index in Splunk Enterprise

State: Published
Severity: 6.8 Medium
Published: Feb 18, 2026
Updated: Feb 26, 2026
Reserved: Oct 8, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	6.8 Medium	CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H	cisco

Weaknesses

CWE-532 Information written to log files can be of a sensitive nature and give valuable guidance to an attacker or expose sensitive user information.

Affected Products

Product	Versions
Splunk EnterpriseSplunk	10.0 to before 10.0.2Affected 9.4 to before 9.4.7Affected 9.3 to before 9.3.9Affected 9.2 to before 9.2.11Affected

References

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

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