CVE-2026-76261

In Splunk Enterprise versions below 10.4.3, 10.2.7, 10.0.10, and 9.4.15, and Splunk Secure Gateway versions below 3.10.11, 3.9.25, and 3.8.72, a user without the admin or power roles could access privileged Splunk Secure Gateway functionality. With this access, the user could cause Splunk Secure Gateway to sign attacker-controlled payloads. The vulnerability is due to multiple REST API endpoints not enforcing authorization requirements before processing requests.

In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, and Splunk Secure Gateway versions below 3.10.9, 3.9.23, and 3.8.70, a user who does not hold the "admin" or "power" Splunk roles could use crafted report notification data to cause Splunk Secure Gateway to send a request to the Splunk Enterprise REST API using a system-level session token and modify the Splunk platform configuration. The user could then obtain a session token without a password and use it to access all relevant data and affect system integrity. The vulnerability exists because Splunk Secure Gateway does not validate decoded report notification identifiers before using them to construct requests to the Splunk Enterprise REST API.

In Splunk Enterprise below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, and Splunk Secure Gateway below 3.10.10, 3.9.24, and 3.8.71, a user without 'admin' or 'power' roles can register an arbitrary companion app and cause Splunk Secure Gateway to forward mobile user requests, including tokens, to an attacker-controlled URL. The vulnerability is due to a hard-coded cryptographic key in the companion app registration handler allowing unrestricted callback URL registration.

In Splunk Enterprise below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, and Splunk Secure Gateway below 3.10.10, 3.9.24, and 3.8.71, a user with permissions to list storage passwords but without Splunk Secure Gateway admin privileges can access MDM signing secrets, compromising mobile-device enrollment trust. The vulnerability is due to REST API endpoints for deployment bundle, SAML setup, and companion app workflows not requiring Splunk Secure Gateway admin privileges.

In Splunk Enterprise below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, and Splunk Secure Gateway below 3.10.9, 3.9.23, and 3.8.70, a user without 'admin' or 'power' roles can read sensitive SAML setup and instance settings information via Splunk Secure Gateway REST API endpoints. The vulnerability is due to these endpoints not enforcing authorization requirements before returning configuration information.