CVE-2026-20204 HIGH

CVE-2026-20204: Improper Handling and Insufficient Isolation of Specific Temporary Files in Splunk Enterprise

Vendor Splunk
Product Splunk Enterprise
Weakness CWE-377
Published April 15, 2026
Last update April 16, 2026

CVSS base score

7.1/10
Attack vector Network
Attack complexity High
Privileges required Low
User interaction Required
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

April 15, 2026 CVE published
April 16, 2026 Record updated