Improper Input Validation during User Account Creation in Splunk Enterprise

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Summary

CVECVE-2026-20202
StatePUBLISHED
Assignercisco
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-04-15 16:16:34 UTC
Updated2026-04-17 19:10:36 UTC
DescriptionIn 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.

Risk And Classification

Primary CVSS: v3.1 6.6 MEDIUM from [email protected]

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS: 0.000410000 probability, percentile 0.123820000 (date 2026-04-20)

Problem Types: CWE-176 | CWE-176 The software does not properly handle when an input contains Unicode encoding.

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.6MEDIUMCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
3.1CNACVSS6.6MEDIUMCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Splunk Splunk All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Splunk Splunk Enterprise affected 10.2 10.2.2 custom Not specified
CNA Splunk Splunk Enterprise affected 10.0 10.0.5 custom Not specified
CNA Splunk Splunk Enterprise affected 9.4 9.4.10 custom Not specified
CNA Splunk Splunk Enterprise affected 9.3 9.3.11 custom Not specified
CNA Splunk Splunk Cloud Platform affected 10.4.2603 Not Affected custom Not specified
CNA Splunk Splunk Cloud Platform affected 10.3.2512 10.3.2512.6 custom Not specified
CNA Splunk Splunk Cloud Platform affected 10.2.2510 10.2.2510.10 custom Not specified
CNA Splunk Splunk Cloud Platform affected 10.1.2507 10.1.2507.20 custom Not specified
CNA Splunk Splunk Cloud Platform affected 10.0.2503 10.0.2503.13 custom Not specified
CNA Splunk Splunk Cloud Platform affected 9.3.2411 9.3.2411.127 custom Not specified

References

ReferenceSourceLinkTags
advisory.splunk.com/advisories/SVD-2026-0401 [email protected] advisory.splunk.com Vendor Advisory
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Ryan Luke<br><br>Mahfujur Rahman (mahfujwhh) (en)

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