Vulnerability · Published Apr 15, 2026 · Assigned by cisco
CVE-2026-20204Improper Handling and Insufficient Isolation of Specific Temporary Files in Splunk Enterprise
High 7.1
In plain English
A high-severity security flaw in Splunk Cloud Platform from Splunk. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 3.1% (higher than 88% of all known vulnerabilities).
Official description
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.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Splunk | Splunk Enterprise | 10.2 – before 10.2.110.0 – before 10.0.59.4 – before 9.4.109.3 – before 9.3.11 |
| Splunk | Splunk Cloud Platform | 10.4.2603 – before Not Affected10.3.2512 – before 10.3.2512.510.2.2510 – before 10.2.2510.910.1.2507 – before 10.1.2507.1910.0.2503 – before 10.0.2503.139.3.2411 – before 9.3.2411.127 |
Weakness: CWE-377 · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H