Home/CVE/In Splunk Enterprise versions below 10.2.2, 10.0.5, 9.4.10, and 9.3.11, and Splunk Cloud Platform versions below 10.4.26
CVE

CVE-2026-20202

In Splunk Enterprise versions below 10.2.2, 10.0.5, 9.4.10, and 9.3.11, and Splunk Cloud Platform versions below 10.4.26

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_usercould 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.

MEDIUM · CVSS 6.6 EPSS 0.00059
Monitor
  • No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence
Sigma rules0 YARA rules0
⬡

Weakness Classification

CWE-176Improper Handling of Unicode Encoding
▤

Affected Products & Versions

9
splunk>= 9.3.0 and < 9.3.11
splunk>= 9.4.0 and < 9.4.10
splunk>= 10.0.0 and < 10.0.5
splunk>= 10.2.0 and < 10.2.2
splunk cloud platform>= 9.3.2411 and < 9.3.2411.127
splunk cloud platform>= 10.0.2503 and < 10.0.2503.13
splunk cloud platform>= 10.1.2507 and < 10.1.2507.20
splunk cloud platform>= 10.2.2510 and < 10.2.2510.10
▣

Scoring & Timeline

6.6
MEDIUM · CVSS v3.1 · psirt@cisco.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD15 Apr 2026 · 04:16 PM
CVSS VectorCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
SSVC triage · cisa-vulnrichment
Exploitation
none
Automatable
no
Technical impact
total
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://advisory.splunk.com/advisories/SVD-2026-0401Vendor Advisory
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