Medium 6.6Published Apr 15, 2026

CVE-2026-20202Improper Input Validation during User Account Creation in Splunk Enterprise

Updated under an hour ago (Oct 28, 2026, 2:30 PM ET)

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It affects Splunk Enterprise and 3 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for Splunk Enterprise

Exploited in the last 30 days

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: 6.6 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-176
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: cisco
NVD analysis: Analyzed
Record last updated: Apr 15, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Splunk Splunk Enterprise splunk:enterprise (from the name)	from 10.2 before 10.2.2; from 10.0 before 10.0.5; from 9.4 before 9.4.10; from 9.3 before 9.3.11	CNA record
Splunk Splunk Cloud Platform splunk:cloud_platform (from the name)	from 10.4.2603 before Not Affected; from 10.3.2512 before 10.3.2512.6; from 10.2.2510 before 10.2.2510.10; from 10.1.2507 before 10.1.2507.20; from 10.0.2503 before 10.0.2503.13; from 9.3.2411 before 9.3.2411.127	CNA record
splunk splunk splunk:splunk	from 9.3.0 before 9.3.11; from 9.4.0 before 9.4.10; from 10.0.0 before 10.0.5; from 10.2.0 before 10.2.2	NVD
splunk splunk_cloud_platform splunk:splunk_cloud_platform	from 9.3.2411 before 9.3.2411.127; from 10.0.2503 before 10.0.2503.13; from 10.1.2507 before 10.1.2507.20; from 10.2.2510 before 10.2.2510.10; from 10.3.2512 before 10.3.2512.6	NVD

References

References

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

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.