CVE-2026-20204

HIGH

Improper Handling and Insufficient Isolation of Specific Temporary Files in Splunk Enterprise

Title source: cna

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.

References (1)

https://advisory.splunk.com/advisories/SVD-2026-0403

Scores

CVSS v3 7.1

EPSS 0.0018

EPSS Percentile 39.8%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact total

Details

CWE

CWE-377

Status published

Products (13)

splunk/splunk 10.2.0

splunk/splunk 9.3.0 - 9.3.11

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

Splunk/Splunk Cloud Platform 10.4.2603 - Not Affected

Splunk/Splunk Cloud Platform 9.3.2411 - 9.3.2411.127

Splunk/Splunk Enterprise 10.0 - 10.0.5

Splunk/Splunk Enterprise 10.2 - 10.2.1

... and 3 more

Published Apr 15, 2026

Tracked Since Apr 15, 2026