CVE-2026-20202
Improper Input Validation during User Account Creation in Splunk Enterprise
MEDIUM 6.6
At a glance
- Source
- NVD
- EPSS
- EPSS 0.25 % · percentile 16 ()
- State
- PUBLISHED
- Published
- Updated
- Assigner
- cisco
- NVD status
- Analyzed
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.
Weaknesses (CWE)
- CWE-176 — Improper Handling of Unicode Encoding
References
Scores
| Version | Score | Vector | Scored by |
|---|---|---|---|
| CVSS 3.1 | MEDIUM 6.6 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H | cisco |
| CVSS 3.1 | MEDIUM 6.6 | CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H | NVD · psirt@cisco.com (Secondary) |
European references
- ENISA EUVD · EUVD-2026-22930
- GCVE · GCVE-0-2026-20202
CERT-FR advisories
- CERTFR-2026-AVI-0450 — Multiples vulnérabilités dans les produits Splunk · cert.ssi.gouv.fr
Affected configurations (NVD CPE)
cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*≥ 9.3.0 < 9.3.11cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*≥ 9.4.0 < 9.4.10cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*≥ 10.0.0 < 10.0.5cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*≥ 10.2.0 < 10.2.2cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*≥ 9.3.2411 < 9.3.2411.127cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*≥ 10.0.2503 < 10.0.2503.13cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*≥ 10.1.2507 < 10.1.2507.20cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*≥ 10.2.2510 < 10.2.2510.10cpe:2.3:a:splunk:splunk_cloud_platform:*:*:*:*:*:*:*:*≥ 10.3.2512 < 10.3.2512.6
Affected products
| Product | Versions |
|---|---|
| Splunk · Splunk Enterprise | affected 10.2 < 10.2.2 ; affected 10.0 < 10.0.5 ; affected 9.4 < 9.4.10 ; affected 9.3 < 9.3.11 |
| Splunk · Splunk Cloud Platform | affected 10.4.2603 < Not Affected ; affected 10.3.2512 < 10.3.2512.6 ; affected 10.2.2510 < 10.2.2510.10 ; affected 10.1.2507 < 10.1.2507.20 ; affected 10.0.2503 < 10.0.2503.13 ; affected 9.3.2411 < 9.3.2411.127 |
Sources
| Source | Licence |
|---|---|
| CVE List (CVEProject cvelistV5) | CVE Program Terms of Use |
| EPSS (FIRST.org) | FIRST — attribution requested |
| ENISA EUVD | ENISA — reproduction authorised, source acknowledged |
| CERT-FR (ANSSI) | Licence Ouverte / Etalab 2.0 |
| NVD (NIST) via fkie-cad/nvd-json-data-feeds | Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD |