CVE-2026-20204

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

State: Published
Severity: 7.1 High
Published: Apr 15, 2026
Updated: Apr 16, 2026
Reserved: Oct 8, 2025

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.

Scores

CVSS	Score	Vector	Source
3.1	7.1 High	CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H	cisco

Weaknesses

CWE-377 Creating and using insecure temporary files can leave application and system data vulnerable to attack.

Affected Products

Product	Versions
Splunk EnterpriseSplunk	10.2 to before 10.2.1Affected 10.0 to before 10.0.5Affected 9.4 to before 9.4.10Affected 9.3 to before 9.3.11Affected
Splunk Cloud PlatformSplunk	10.4.2603 to before Not AffectedAffected 10.3.2512 to before 10.3.2512.5Affected 10.2.2510 to before 10.2.2510.9Affected 10.1.2507 to before 10.1.2507.19Affected 10.0.2503 to before 10.0.2503.13Affected 9.3.2411 to before 9.3.2411.127Affected

References

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

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.