CVE-2026-20202

Published Apr 15, 2026

Last updated 6 days ago

Overview

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.
Source
psirt@cisco.com
NVD status
Analyzed
Products
splunk, splunk_cloud_platform

Risk scores

CVSS 3.1

Type
Primary
Base score
6.6
Impact score
5.9
Exploitability score
0.7
Vector string
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Severity
MEDIUM

Weaknesses

psirt@cisco.com
CWE-176

Social media

Hype score
Not currently trending

Configurations

References

Sources include official advisories and independent security research.