{"timestamp":"2026-04-15T00:00:00+00:00","id":"CVE-2026-20202","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}

[{"vendor":"Splunk","product":"Splunk Enterprise","versions":[{"version":"10.2","lessThan":"10.2.2","versionType":"custom","status":"affected"},{"version":"10.0","lessThan":"10.0.5","versionType":"custom","status":"affected"},{"version":"9.4","lessThan":"9.4.10","versionType":"custom","status":"affected"},{"version":"9.3","lessThan":"9.3.11","versionType":"custom","status":"affected"}]},{"vendor":"Splunk","product":"Splunk Cloud Platform","versions":[{"version":"10.4.2603","lessThan":"Not Affected","versionType":"custom","status":"affected"},{"version":"10.3.2512","lessThan":"10.3.2512.6","versionType":"custom","status":"affected"},{"version":"10.2.2510","lessThan":"10.2.2510.10","versionType":"custom","status":"affected"},{"version":"10.1.2507","lessThan":"10.1.2507.20","versionType":"custom","status":"affected"},{"version":"10.0.2503","lessThan":"10.0.2503.13","versionType":"custom","status":"affected"},{"version":"9.3.2411","lessThan":"9.3.2411.127","versionType":"custom","status":"affected"}]}]

OR
          *cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* versions from (including) 10.0.0 up to (excluding) 10.0.5
          *cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* versions from (including) 9.3.0 up to (excluding) 9.3.11
          *cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* versions from (including) 9.4.0 up to (excluding) 9.4.10
          *cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* versions from (including) 10.2.0 up to (excluding) 10.2.2

OR
          *cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* versions from (including) 10.0.2503 up to (excluding) 10.0.2503.13
          *cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* versions from (including) 10.1.2507 up to (excluding) 10.1.2507.20
          *cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* versions from (including) 10.2.2510 up to (excluding) 10.2.2510.10
          *cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* versions from (including) 10.3.2512 up to (excluding) 10.3.2512.6
          *cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:* versions from (including) 9.3.2411 up to (excluding) 9.3.2411.127

Cisco Systems, Inc.: https://advisory.splunk.com/advisories/SVD-2026-0401 Types: Vendor Advisory

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.

AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

CWE-176

https://advisory.splunk.com/advisories/SVD-2026-0401