#VU126411 Improper Handling of Unicode Encoding in Splunk Enterprise - CVE-2026-20202
Published: April 17, 2026
Vulnerability identifier: #VU126411
Vulnerability risk: Low
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-20202
CWE-ID: CWE-176
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerable software:
Splunk Enterprise
Splunk Enterprise
Software vendor:
Splunk Inc.
Splunk Inc.
Description
The vulnerability allows a remote user to cause account management inconsistencies.
The vulnerability exists due to improper input validation in the REST API user account creation functionality when processing specially crafted usernames containing a null byte or a non-UTF-8 percent-encoded byte. A remote privileged user can create a specially crafted username to cause account management inconsistencies.
Affected accounts may become impossible to edit or delete.
Remediation
Install security update from vendor's website.