CVE-2026-20204
Last modified
CVE-2026-20204 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. 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 `$SPLUNK_HOME/var/run/splunk/apptemp` directory due to improper handling and insufficient isolation of temporary files within the `apptemp` directory.. EPSS estimates a 3.28% chance of exploitation in the next 30 days.
Description
In Splunk Enterprise versions below 10.2.1, 10.0.5, 9.4.10, and 9.3.11, and Splunk Cloud Platform versions below 10.4.2603.0, 10.3.2512.5, 10.2.2510.9, 10.1.2507.19, 10.0.2503.13, and 9.3.2411.127, a low-privileged user that does not hold the `admin` or `power` Splunk roles could potentially perform a Remote Code Execution (RCE) by uploading a malicious file to the `$SPLUNK_HOME/var/run/splunk/apptemp` directory due to improper handling and insufficient isolation of temporary files within the `apptemp` directory.
Metrics
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
Weakness Enumeration
Affected Software
| Vendor | Product | Versions |
|---|---|---|
| Splunk | Splunk | >= 9.3.0, < 9.3.11 |
| Splunk | Splunk | >= 9.4.0, < 9.4.10 |
| Splunk | Splunk | >= 10.0.0, < 10.0.5 |
| Splunk | Splunk | 10.2.0 |
| Splunk | Splunk Cloud Platform | >= 9.3.2411, < 9.3.2411.127 |
| Splunk | Splunk Cloud Platform | >= 10.0.2503, < 10.0.2503.13 |
| Splunk | Splunk Cloud Platform | >= 10.1.2507, < 10.1.2507.19 |
| Splunk | Splunk Cloud Platform | >= 10.2.2510, < 10.2.2510.9 |
| Splunk | Splunk Cloud Platform | >= 10.3.2512, < 10.3.2512.5 |
References
- https://advisory.splunk.com/advisories/SVD-2026-0403Vendor Advisory
Timeline
- Published
- Last Modified
- Status
- Analyzed
Frequently Asked Questions
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How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
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