---
id: CVE-2026-76277
title: >-
  In Splunk Enterprise versions below 10.4.3, 10.2.7, 10.0.10, and 9.4.15, a
  user that holds a role with the edit_user capability could create a native
  Splunk username that ends with a period
summary: >-
  In Splunk Enterprise versions below 10.4.3, 10.2.7, 10.0.10, and 9.4.15, a
  user that holds a role with the edit_user capability could create a native
  Splunk username that ends with a period. The vulnerability is possible because
  username…
severity: medium
cvss: 4.1
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L'
cwe:
  - CWE-20
vendor: splunk
product: splunk
affected:
  - 'splunk >= 9.4.0, < 9.4.15'
  - 'splunk >= 10.0.0, < 10.0.10'
  - 'splunk >= 10.2.0, < 10.2.7'
  - 'splunk >= 10.4.0, < 10.4.3'
patched:
  - splunk 10.4.3
published: '2026-10-07'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T12:03:45.950'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-76277'
references:
  - url: 'https://advisory.splunk.com/advisories/SVD-2026-1001'
    label: psirt@cisco.com
tags:
  - nvd
  - cve.org
epss: 0.00244
epssPercentile: 0.15573
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-08T15:05:55.710479Z'
ingestedAt: '2026-10-07T21:54:15.096Z'
---

## Overview

In Splunk Enterprise versions below 10.4.3, 10.2.7, 10.0.10, and 9.4.15, a user that holds a role with the edit_user capability could create a native Splunk username that ends with a period. The vulnerability is possible because username validation does not reject a trailing period before the username is used for a user directory. This can cause distinct native Splunk usernames to share per-user configuration data, and user-management operations can affect the wrong account or fail. For more information see Set up native Splunk authentication (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.4/use-the-native-splunk-platform-authentication-scheme/set-up-native-splunk-authentication) and Define roles on the Splunk platform with capabilities (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.4/manage-splunk-platform-users-and-roles/define-roles-on-the-splunk-platform-with-capabilities) in the Splunk documentation.

## Affected

- `splunk >= 9.4.0, < 9.4.15`
- `splunk >= 10.0.0, < 10.0.10`
- `splunk >= 10.2.0, < 10.2.7`
- `splunk >= 10.4.0, < 10.4.3`

## Remediation

Upgrade past the affected range:

- `splunk 10.4.3`