Splunk Enterprise up to 9.4.14/10.0.9/10.2.6/10.4.2 Username Validation privileges management

Summaryinfo

A vulnerability classified as problematic was found in Splunk Enterprise up to 9.4.14/10.0.9/10.2.6/10.4.2. Impacted is an unknown function of the component Username Validation. Executing a manipulation can lead to privileges management. This vulnerability is handled as CVE-2026-76277. The attack can be executed remotely. There is not any exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability has been found in Splunk Enterprise up to 9.4.14/10.0.9/10.2.6/10.4.2 and classified as problematic. This vulnerability affects an unknown function of the component Username Validation. The manipulation with an unknown input leads to a privileges management vulnerability. The CWE definition for the vulnerability is CWE-269. The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

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.

The advisory is shared for download at advisory.splunk.com. This vulnerability was named CVE-2026-76277 since 08/19/2026. The exploitation appears to be easy. The attack can be initiated remotely. The exploitation needs additional levels of successful authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1068.

Upgrading to version 9.4.15, 10.0.10, 10.2.7 or 10.4.3 eliminates this vulnerability.

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Productinfo

Type

• Log Management Software

Vendor

• Splunk

Name

• Enterprise

Version

• 9.4.0
• 9.4.1
• 9.4.2
• 9.4.3
• 9.4.4
• 9.4.5
• 9.4.6
• 9.4.7
• 9.4.8
• 9.4.9
• 9.4.10
• 9.4.11
• 9.4.12
• 9.4.13
• 9.4.14
• 10.0.0
• 10.0.1
• 10.0.2
• 10.0.3
• 10.0.4
• 10.0.5
• 10.0.6
• 10.0.7
• 10.0.8
• 10.0.9
• 10.2.0
• 10.2.1
• 10.2.2
• 10.2.3
• 10.2.4
• 10.2.5
• 10.2.6
• 10.4.0
• 10.4.1
• 10.4.2

License

• commercial

CPE 2.3info

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• 🔒
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CPE 2.2info

• 🔒
• 🔒
• 🔒

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