CVE-2026-76277 (GCVE-0-2026-76277)

Vulnerability from cvelistv5 – Published: 2026-10-07 20:46 – Updated: 2026-10-07 20:46
VLAI
Title
Improper Input Validation of Native Splunk Usernames through the REST API in Splunk Enterprise
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 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.
Severity
4.1 (Medium)
CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:L
CWE
  • CWE-20 - The product does not validate or incorrectly validates input that can affect the control flow or data flow of a program.
Assigner
References
Impacted products
Vendor Product Version
Splunk Splunk Enterprise Affected: 10.4 , < 10.4.3 (custom)
Affected: 10.2 , < 10.2.7 (custom)
Affected: 10.0 , < 10.0.10 (custom)
Affected: 9.4 , < 9.4.15 (custom)
Create a notification for this product.
Date Public
2026-10-07 00:00
Credits
Gabriel Nitu, Splunk
Show details on NVD website
To clipboard 

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