Medium severity · published Feb 18, 2026
CVE-2026-20138
Sensitive Information Disclosure in "_internal" index in Splunk Enterprise
4.9
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
High
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 28% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
SE
Splunk Enterprise · Splunk
10.0 before 10.0.2; 9.4 before 9.4.7; 9.3 before 9.3.9; 9.2 before 9.2.11 · source: vendor
SP
Splunk · Splunk
9.2.0 before 9.2.11; 9.3.0 before 9.3.9; 9.4.0 before 9.4.7; 10.0.0 before 10.0.2 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-20138
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-20138
Vendor Advisory
https://advisory.splunk.com/advisories/SVD-2026-0203
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