# CVE-2026-20202

## Summary

- **CVE ID:** CVE-2026-20202
- **Severity:** MEDIUM
- **CVSS Score:** 6.6 (CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** CWE-176
- **Published:** Apr 15, 2026
- **Last Modified:** Apr 16, 2026

## 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.

## Affected Products

- Splunk — Splunk Enterprise (10.2)
- Splunk — Splunk Enterprise (10.0)
- Splunk — Splunk Enterprise (9.4)
- Splunk — Splunk Enterprise (9.3)
- Splunk — Splunk Cloud Platform (10.4.2603)
- Splunk — Splunk Cloud Platform (10.3.2512)
- Splunk — Splunk Cloud Platform (10.2.2510)
- Splunk — Splunk Cloud Platform (10.1.2507)
- Splunk — Splunk Cloud Platform (10.0.2503)
- Splunk — Splunk Cloud Platform (9.3.2411)

## References

- [CNA](https://advisory.splunk.com/advisories/SVD-2026-0401)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.25%
- **EPSS Percentile:** 15.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._