CyberCVE

CVE-2026-20202

Improper Input Validation during User Account Creation in Splunk Enterprise

Severity
Medium 6.6
CVSS 3.1
Exploited
Not listed
EPSS
0.002
15.9th percentile
Discovered by
Not disclosed
Published
Apr 15, 2026
Assigned by cisco

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.

Weakness: CWE-176

Affected products

Vendor Product Category Matched by

No product mapping yet — this CVE is pending taxonomy review.

Vendor-reported affected versions (2)
  • Splunk · Splunk Enterprise
  • Splunk · Splunk Cloud Platform

Credit

Ryan Luke<br><br>Mahfujur Rahman (mahfujwhh)

References