CVE-2026-20139
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.
| Software | From | Fixed in |
|---|---|---|
| splunk / splunk | 9.2.0 | 9.2.12 |
| splunk / splunk | 9.3.0 | 9.3.9 |
| splunk / splunk | 9.4.0 | 9.4.8 |
| splunk / splunk | 10.0.0 | 10.0.2 |
| splunk / splunk_cloud_platform | 9.3.2411 | 9.3.2411.121 |
| splunk / splunk_cloud_platform | 10.0.2503 | 10.0.2503.9 |
| splunk / splunk_cloud_platform | 10.1.2507 | 10.1.2507.8 |
| splunk / splunk_cloud_platform | 10.2.2510 | 10.2.2510.3 |
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