CVE-2026-76258: In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, and Splunk Secure Gateway versions below 3.10.10, 3.9.24, and 3.8.71, a user who does…

PriorityP342medium6.5CVSS 3.1

AVNACLPRLUINSUCHINAN

EPSS

0.25%

16.4th percentile

In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, and Splunk Secure Gateway versions below 3.10.10, 3.9.24, and 3.8.71, a user who does not hold the "admin" or "power" Splunk roles could register an arbitrary companion app and cause Splunk Secure Gateway to forward mobile user requests, including tokens that compromise all relevant data available to the affected mobile user, to an attacker-controlled Uniform Resource Locator (URL). The vulnerability is possible because a hard-coded cryptographic key in the Splunk Secure Gateway companion app registration handler allows for arbitrary callback URL registration without restriction. For more information see Define roles on the Splunk platform with capabilities (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.2/manage-splunk-platform-users-and-roles/define-roles-on-the-splunk-platform-with-capabilities) in the Splunk documentation.

Affected

14 ranges

Vendor	Product	Version range	Fixed in
splunk	splunk	>= 10.0.0 < 10.0.9	10.0.9
splunk	splunk	>= 10.2.0 < 10.2.6	10.2.6
splunk	splunk	>= 10.4.0 < 10.4.2	10.4.2
splunk	splunk	>= 9.4.0 < 9.4.14	9.4.14
splunk	splunk_enterprise	>= 10.0 < 10.0.9	10.0.9
splunk	splunk_enterprise	>= 10.2 < 10.2.6	10.2.6
splunk	splunk_enterprise	>= 10.4 < 10.4.2	10.4.2
splunk	splunk_enterprise	>= 9.4 < 9.4.14	9.4.14
splunk	splunk_secure_gateway	>= 3.10 < 3.10.10	3.10.10
splunk	splunk_secure_gateway	>= 3.10.0 < 3.10.10	3.10.10
splunk	splunk_secure_gateway	>= 3.8 < 3.8.71	3.8.71
splunk	splunk_secure_gateway	>= 3.8.0 < 3.8.71	3.8.71
splunk	splunk_secure_gateway	>= 3.9 < 3.9.24	3.9.24
splunk	splunk_secure_gateway	>= 3.9.0 < 3.9.24	3.9.24

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