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

> CVE-2026-20204: Improper Handling and Insufficient Isolation of Specific Temporary Files in Splunk Enterprise. CVSS 7.1 (CVSS 3.1).

Canonical: https://rewindex.com/cve/CVE-2026-20204
Last updated: 2026-06-17T10:17:17Z

- Published: 2026-04-15 15:17 UTC · Updated: 2026-06-17 10:17 UTC · Assigner: cisco
- CVSS: 7.1 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H
- EPSS: 3.1%, 88th percentile (scored 2026-10-25)
- CISA KEV: no
- CWE: CWE-377

## 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 vendors and products

- Splunk: Splunk Cloud Platform
- Splunk: Splunk Enterprise

## Tracked companies

- [Splunk](https://rewindex.com/company/splunk.md)

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-20204)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2026-20204)
- [https://advisory.splunk.com/advisories/SVD-2026-0403](https://advisory.splunk.com/advisories/SVD-2026-0403)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2026-20204 · Markdown: https://rewindex.com/cve/CVE-2026-20204.md · JSON: https://rewindex.com/api/v1/cves/CVE-2026-20204 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T03:12:19.769Z