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TI-2026-16406 Aliases CVE-2026-20204GHSA-gj97-4w7h-79j2

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

Priority LOW 39CWE-377Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
Required
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.03098 87th percentileScored 2026-11-07
Fix Fixed Splunk Enterprise (Splunk): 10.2.1, 10.0.5, 9.4.10 +1Splunk Cloud Platform (Splunk): Not Affected, 10.3.2512.5, 10.2.2510.9 +3

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SplunkSplunk Enterprise10.2 to before 10.2.1; 10.0 to before 10.0.5; 9.4 to before 9.4.10; 9.3 to before 9.3.1110.2.1, 10.0.5, 9.4.10, 9.3.11Patch availableCNA
SplunkSplunk Cloud Platform10.4.2603 to before Not Affected; 10.3.2512 to before 10.3.2512.5; 10.2.2510 to before 10.2.2510.9; 10.1.2507 to before 10.1.2507.19; 10.0.2503 to before 10.0.2503.13; 9.3.2411 to before 9.3.2411.127Not Affected, 10.3.2512.5, 10.2.2510.9, 10.1.2507.19, 10.0.2503.13, 9.3.2411.127Patch availableCNA
  • Splunk Enterprise VendorSplunk Affected 10.2 to before 10.2.1; 10.0 to before 10.0.5; 9.4 to before 9.4.10; 9.3 to before 9.3.11 Fixed in 10.2.1, 10.0.5, 9.4.10, 9.3.11 Patch available CNA
  • Splunk Cloud Platform VendorSplunk Affected 10.4.2603 to before Not Affected; 10.3.2512 to before 10.3.2512.5; 10.2.2510 to before 10.2.2510.9; 10.1.2507 to before 10.1.2507.19; 10.0.2503 to before 10.0.2503.13; 9.3.2411 to before 9.3.2411.127 Fixed in Not Affected, 10.3.2512.5, 10.2.2510.9, 10.1.2507.19, 10.0.2503.13, 9.3.2411.127 Patch available CNA

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*9.3.0 to before 9.3.11; 9.4.0 to before 9.4.10; 10.0.0 to before 10.0.5VulnerableSplunk
cpe:2.3:a:splunk:splunk:10.2.0:*:*:*:enterprise:*:*:*10.2.0VulnerableSplunk
cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*9.3.2411 to before 9.3.2411.127; 10.0.2503 to before 10.0.2503.13; 10.1.2507 to before 10.1.2507.19; 10.2.2510 to before 10.2.2510.9; 10.3.2512 to before 10.3.2512.5VulnerableSplunk
  • cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* Versions 9.3.0 to before 9.3.11; 9.4.0 to before 9.4.10; 10.0.0 to before 10.0.5 Vulnerable ·Splunk
  • cpe:2.3:a:splunk:splunk:10.2.0:*:*:*:enterprise:*:*:* Versions 10.2.0 Vulnerable ·Splunk
  • cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* Versions 9.3.2411 to before 9.3.2411.127; 10.0.2503 to before 10.0.2503.13; 10.1.2507 to before 10.1.2507.19; 10.2.2510 to before 10.2.2510.9; 10.3.2512 to before 10.3.2512.5 Vulnerable ·Splunk

Remediation

  • Fix · CNA Splunk Enterprise (Splunk) Fixed in 10.2.1, 10.0.5, 9.4.10, 9.3.11
  • Fix · CNA Splunk Cloud Platform (Splunk) Fixed in Not Affected, 10.3.2512.5, 10.2.2510.9, 10.1.2507.19, 10.0.2503.13, 9.3.2411.127

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-20204
  2. 2026-10-03 Alias added: GHSA-gj97-4w7h-79j2

References

Advisory 1

  • TI-2026-16444 Unauthenticated Arbitrary File Creation and Truncation in a PostgreSQL Sidecar Service Endpoint in Splunk Enterprise KEVCVSS 3.1CRITICAL 9.8
  • TI-2014-00154 The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly… KEVCVSS 3.1HIGH 7.5
  • TI-2023-24841 Remote code execution (RCE) in Splunk Enterprise through Insecure XML Parsing CVSS 3.1HIGH 8.8
  • TI-2023-15979 ‘edit_user’ Capability Privilege Escalation CVSS 3.1HIGH 8.8
  • TI-2024-30707 Remote Code Execution (RCE) due to insecure session storage configuration in Splunk Enterprise on Windows CVSS 3.1HIGH 8.8
  • TI-2022-21345 Reflected Cross-Site Scripting via the radio template in Splunk Enterprise CVSS 3.1HIGH 8.8
See all 297 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences