Vulnerability · Published Apr 15, 2026 · Assigned by cisco
CVE-2026-20202Improper Input Validation during User Account Creation in Splunk Enterprise
Medium 6.6
In plain English
A medium-severity security flaw in Splunk Cloud Platform from Splunk. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 16% of all known vulnerabilities).
Official description
In Splunk Enterprise versions below 10.2.2, 10.0.5, 9.4.10, and 9.3.11, and Splunk Cloud Platform versions below 10.4.2603.0, 10.3.2512.6, 10.2.2510.10, 10.1.2507.20, 10.0.2503.13, and 9.3.2411.127, a user who holds a role that contains the high-privilege capability `edit_user`could create a specially crafted username that includes a null byte or a non-UTF-8 percent-encoded byte due to improper input validation.<br><br>This could lead to inconsistent conversion of usernames into a proper format for storage and account management inconsistencies, such as being unable to edit or delete affected users.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Splunk | Splunk Enterprise | 10.2 – before 10.2.210.0 – before 10.0.59.4 – before 9.4.109.3 – before 9.3.11 |
| Splunk | Splunk Cloud Platform | 10.4.2603 – before Not Affected10.3.2512 – before 10.3.2512.610.2.2510 – before 10.2.2510.1010.1.2507 – before 10.1.2507.2010.0.2503 – before 10.0.2503.139.3.2411 – before 9.3.2411.127 |
Weakness: CWE-176 · Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H