Information disclosure in Splunk
CVE-2026-20138
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 6.8 (Medium). Vector: CVSS:3.1/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (23.1th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 23rd percentile — 23.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Splunk
- Splunk Enterprise — versions 10.0, 9.4, 9.3
Weakness classification (CWE)
References
- advisory.splunk.com/advisories/SVD-2026-0203 (Vendor Advisory)
Frequently asked questions
- What is CVE-2026-20138?
- CVE-2026-20138 is a medium-severity vulnerability in Splunk, classified under Insertion of Sensitive Information into Log File. CVSS score: 6.8/10. Published 2026-02-18.
- How severe is CVE-2026-20138?
- Medium severity. CVSS v3 base score is 6.8 out of 10.