CVE-2026-20204 json
Improper Handling and Insufficient Isolation of Specific Temporary Files in Splunk Enterprise
published 2026-04-15 6 mo ago modified 2026-10-26 13 d ago also EUVD-2026-22934
- cvss
- 7.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 3.1%
- EPSS 3.1% chance of exploitation in 30 days, percentile 87%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- Splunk Splunk Enterprise 9.3.11, 9.4.10, 10.0.5, 10.2.1
- Splunk Splunk Cloud Platform 9.3.2411.127, 10.0.2503.13, 10.1.2507.19, 10.2.2510.9, 10.3.2512.5
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- total
- Assessed
- 6 mo ago
Exploit prediction
3.10% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.1 | CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:H |
Affected products
- Splunk Splunk Enterprise
- Splunk Splunk Cloud Platform
Classification
- Weakness
-
- CWE-377 DEPRECATED: Insecure Temporary File
References
-
advisory.splunk.com
/advisories/SVD-2026-0403
vendor-advisory
Sources
- CVE List CVE-2026-20204
- NVD CVE-2026-20204
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.