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TI-2026-16351 Aliases CVE-2026-20139GHSA-4vmx-r9fj-4cm5

Uncontrolled resource consumption in Splunk Enterprise

Priority LOW 29CWE-400Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Denial of service
Confidentiality · integrity · availability
None · None · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-400.

Summary

In Splunk Enterprise versions below 10.2.0, 10.0.2, 9.4.8, 9.3.9, and 9.2.12, and Splunk Cloud Platform versions below 10.2.2510.3, 10.1.2507.8, 10.0.2503.9, and 9.3.2411.121, a low-privileged user that does not hold the "admin" or "power" Splunk roles could craft a malicious payload into the `realname`, `tz`, or `email` parameters of the `/splunkd/__raw/services/authentication/users/username` REST API endpoint when they change a password. This could potentially lead to a client‑side denial‑of‑service (DoS). The malicious payload might significantly slow page load times or render Splunk Web temporarily unresponsive.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.05677 93rd percentileScored 2026-11-07
Fix Fixed Splunk Enterprise (Splunk): 10.0.2, 9.4.8, 9.3.9 +1Splunk Cloud Platform (Splunk): 10.2.2510.3, 10.1.2507.8, 10.0.2503.9 +1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

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 Enterprise10.0 to before 10.0.2; 9.4 to before 9.4.8; 9.3 to before 9.3.9; 9.2 to before 9.2.1210.0.2, 9.4.8, 9.3.9, 9.2.12Patch availableCNA
SplunkSplunk Cloud Platform10.2.2510 to before 10.2.2510.3; 10.1.2507 to before 10.1.2507.8; 10.0.2503 to before 10.0.2503.9; 9.3.2411 to before 9.3.2411.12110.2.2510.3, 10.1.2507.8, 10.0.2503.9, 9.3.2411.121Patch availableCNA
  • Splunk Enterprise VendorSplunk Affected 10.0 to before 10.0.2; 9.4 to before 9.4.8; 9.3 to before 9.3.9; 9.2 to before 9.2.12 Fixed in 10.0.2, 9.4.8, 9.3.9, 9.2.12 Patch available CNA
  • Splunk Cloud Platform VendorSplunk Affected 10.2.2510 to before 10.2.2510.3; 10.1.2507 to before 10.1.2507.8; 10.0.2503 to before 10.0.2503.9; 9.3.2411 to before 9.3.2411.121 Fixed in 10.2.2510.3, 10.1.2507.8, 10.0.2503.9, 9.3.2411.121 Patch available CNA

CPE configurations NVD · 2

CPEVersionsRoleVendor
cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*9.2.0 to before 9.2.12; 9.3.0 to before 9.3.9; 9.4.0 to before 9.4.8; 10.0.0 to before 10.0.2VulnerableSplunk
cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*9.3.2411 to before 9.3.2411.121; 10.0.2503 to before 10.0.2503.9; 10.1.2507 to before 10.1.2507.8; 10.2.2510 to before 10.2.2510.3VulnerableSplunk
  • cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* Versions 9.2.0 to before 9.2.12; 9.3.0 to before 9.3.9; 9.4.0 to before 9.4.8; 10.0.0 to before 10.0.2 Vulnerable ·Splunk
  • cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* Versions 9.3.2411 to before 9.3.2411.121; 10.0.2503 to before 10.0.2503.9; 10.1.2507 to before 10.1.2507.8; 10.2.2510 to before 10.2.2510.3 Vulnerable ·Splunk

Remediation

  • Fix · CNA Splunk Enterprise (Splunk) Fixed in 10.0.2, 9.4.8, 9.3.9, 9.2.12
  • Fix · CNA Splunk Cloud Platform (Splunk) Fixed in 10.2.2510.3, 10.1.2507.8, 10.0.2503.9, 9.3.2411.121

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-20139
  2. 2026-10-03 Alias added: GHSA-4vmx-r9fj-4cm5

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