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CVE-2026-20202

Improper Input Validation during User Account Creation in Splunk Enterprise

Published: Apr 15, 2026Updated: Apr 17, 2026 Sources: CVE List NVDCWE-176
NVD MITRE
6.6CVSSMEDIUM
EPSS Score
0.2%
Top 84.4%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available

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.

CVSS Vector Breakdown

AV:NAC:HPR:HUI:NS:UC:HI:HA:H
Exploitability
AV:NAttack Vector
Network
AC:HAttack Complexity
High
PR:HPrivileges Required
High
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:HAvailability
High
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Weaknesses

CWE-176

Affected Products

Splunk EnterpriseSplunkSecurity Products
Splunk Cloud PlatformSplunkSecurity Products
splunksplunkSecurity Products
splunk cloud platformsplunkSecurity Products
splunkcommercialUSSecurity Productsaka splunk enterprise, splunk cloud platform

Exploitability

Official Patch Available

References

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

Timeline

Published
Apr 15, 2026
Last Updated
Apr 17, 2026

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