Splunk Enterprise up to 10.4.1 REST API privileges management

Summaryinfo

A vulnerability identified as problematic has been detected in Splunk Enterprise up to 10.4.1. This issue affects some unknown processing of the component REST API. Performing a manipulation results in privileges management. This vulnerability is reported as CVE-2026-76340. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability classified as problematic has been found in Splunk Enterprise up to 10.4.1. This affects some unknown functionality of the component REST API. The manipulation with an unknown input leads to a privileges management vulnerability. CWE is classifying the issue as 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. This is going to have an impact on integrity. The summary by CVE is:

In Splunk Enterprise 10.4 versions below 10.4.2, an unauthenticated user could cause Splunk Enterprise to reload token-signing keys through the Representational State Transfer (REST) API. The vulnerability does not affect Splunk Enterprise versions below 10.4. The vulnerability is possible because the REST API does not require authentication or the change_authentication capability for the token-key reload action. For more information see 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.

It is possible to read the advisory at advisory.splunk.com. This vulnerability is uniquely identified as CVE-2026-76340 since 08/19/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

Upgrading to version 10.4.2 eliminates this vulnerability.

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Productinfo

Type

• Log Management Software

Vendor

• Splunk

Name

• Enterprise

Version

• 10.4.0
• 10.4.1

License

• commercial

CPE 2.3info

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CPE 2.2info

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• 🔒

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