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, a…
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Splunk | Splunk | from 9.2.0 before 9.2.12 from 9.3.0 before 9.3.9 from 9.4.0 before 9.4.8 from 10.0.0 before 10.0.2 |
| Splunk | Splunk Cloud Platform | from 9.3.2411 before 9.3.2411.121 from 10.0.2503 before 10.0.2503.9 from 10.1.2507 before 10.1.2507.8 from 10.2.2510 before 10.2.2510.3 |