Splunk Enterprise and Cloud Platform
CVE-2026-20204: Improper Handling and Insufficient Isolation of Specific Temporary Files in Splunk Enterprise
In Splunk Enterprise versions below 10.2.1, 10.0.5, 9.4.10, and 9.3.11, and Splunk Cloud Platform versions below 10.4.2603.0, 10.3.2512.5, 10.2.2510.9, 10.1.2507.19, 10.0.2503.13, and 9.3.2411.127, a low-privileged user that does not hold the `admin` or `power` Splunk roles could potentially perform a Remote Code Execution (RCE) by uploading a malicious file to the `$SPLUNK_HOME/var/run/splunk/apptemp` directory due to improper handling and insufficient isolation of temporary files within the `apptemp` directory.
Published
Automatic summary from the vendor's CVE record. We haven't written a full analysis of this vulnerability yet.
Affected and fixed versions
| Product / branch | Fixed in |
|---|---|
| Splunk Enterprise 10.2 | 10.2.1 or later |
| Splunk Enterprise 10.0 | 10.0.5 or later |
| Splunk Enterprise 9.4 | 9.4.10 or later |
| Splunk Enterprise 9.3 | 9.3.11 or later |
| Splunk Cloud Platform 10.4 | Not Affected or later |
| Splunk Cloud Platform 10.3 | 10.3.2512.5 or later |
| Splunk Cloud Platform 10.2 | 10.2.2510.9 or later |
| Splunk Cloud Platform 10.1 | 10.1.2507.19 or later |
| Splunk Cloud Platform 10.0 | 10.0.2503.13 or later |
| Splunk Cloud Platform 9.3 | 9.3.2411.127 or later |
Always confirm against the vendor advisory, which lists every fixed hotfix.
What it is
In Splunk Enterprise versions below 10.2.1, 10.0.5, 9.4.10, and 9.3.11, and Splunk Cloud Platform versions below 10.4.2603.0, 10.3.2512.5, 10.2.2510.9, 10.1.2507.19, 10.0.2503.13, and 9.3.2411.127, a low-privileged user that does not hold the `admin` or `power` Splunk roles could potentially perform a Remote Code Execution (RCE) by uploading a malicious file to the `$SPLUNK_HOME/var/run/splunk/apptemp` directory due to improper handling and insufficient isolation of temporary files within the `apptemp` directory.
Sources
KEV status, EPSS score and vendor data refreshed automatically, last on 13 Oct 2026.