Splunk Enterprise and Cloud Platform
CVE-2026-20239: Sensitive Information Disclosure through Log Files in Splunk Enterprise
In Splunk Enterprise versions below 10.2.2 and 10.0.5, and Splunk Cloud Platform versions below 10.3.2512.8, 10.2.2510.11, 10.1.2507.21, and 10.0.2503.13, a user with a role that has access to the `_internal` index could view session cookies and response bodies that contain sensitive data.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Splunk Enterprise 10.2 | 10.2.2 or later |
| Splunk Enterprise 10.0 | 10.0.5 or later |
| Splunk Cloud Platform 10.3 | 10.3.2512.8 or later |
| Splunk Cloud Platform 10.2 | 10.2.2510.11 or later |
| Splunk Cloud Platform 10.1 | 10.1.2507.21 or later |
| Splunk Cloud Platform 10.0 | 10.0.2503.13 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
In Splunk Enterprise versions below 10.2.2 and 10.0.5, and Splunk Cloud Platform versions below 10.3.2512.8, 10.2.2510.11, 10.1.2507.21, and 10.0.2503.13, a user with a role that has access to the `_internal` index could view session cookies and response bodies that contain sensitive data.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.