7.1

CVE-2026-20204: splunk Insecure Temporary File

CVSS: 7.1v3.1HighAnalyzed
Published 15-04-2026Last modified 16-04-2026
Open JSON

Vulnerability summary

CVE-2026-20204 is a high (CVSS 7.1) Insecure Temporary File vulnerability in splunk. EPSS estimates a 3.10% chance of exploitation in the next 30 days, higher than 87.5% of scored vulnerabilities.

Overall risk
29/100
0100
Medium · default modelHow is this calculated?
CVSS score
7.1/10
010
High · v3.1 (CVE.org)
EPSS score
3.10%
0%100%
Low · 0.00 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Timeline

  1. 15-04-2026
    PublishedVulnerability first disclosed.
  2. 16-04-2026
    Last modifiedVulnerability information updated.

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.

CVSS metrics

2 scores · 2 sources · 1 version

EPSS trend

Probability

3.10%

Chance of exploitation in the next 30 days

Percentile

88%

Versus all other CVEs

30-day change

0.00 pp

From 3.10% on 19-09-2026

19-09-202619-10-2026
EPSS score
3.10%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Splunk3 products
  • splunk≥ 9.3.0, < 9.3.11 | ≥ 9.4.0, < 9.4.10 | ≥ 10.0.0, < 10.0.5 | 10.2.0
  • splunk_cloud_platform≥ 10.4.2603, < Not Affected | ≥ 9.3.2411, < 9.3.2411.127 | ≥ 10.0.2503, < 10.0.2503.13 | ≥ 10.1.2507, < 10.1.2507.19 | ≥ 10.2.2510, < 10.2.2510.9 | ≥ 10.3.2512, < 10.3.2512.5
  • splunk enterprise≥ 10.2, < 10.2.1 | ≥ 10.0, < 10.0.5 | ≥ 9.4, < 9.4.10 | ≥ 9.3, < 9.3.11

1 vendor · 3 products

References

1 links