CVE-2026-76325: Stored Cross-Site Scripting (XSS) through Splunk Web in Splunk Enterprise
In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, a user who holds the "power" Splunk role could store a malicious ui-tour knowledge object that matches an auto-tour page name and share the object at the app level. The object can execute arbitrary JavaScript in the browser of another authenticated user who visits a standard Splunk Web page. The JavaScript could expose all relevant data and affect system integrity within the second user permissions. The Cross-Site Scripting (XSS) vulnerability is possible because Splunk Web resolves auto-tour entries from the app namespace and uses untrusted tour content when building the tour image.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Splunk Enterpriseto a version that resolves this vulnerability.Fixed in 10.4.2 - Upgrade
Upgrade
Splunk Enterpriseto a version that resolves this vulnerability.Fixed in 10.2.6 - Upgrade
Upgrade
Splunk Enterpriseto a version that resolves this vulnerability.Fixed in 10.0.9 - Upgrade
Upgrade
Splunk Enterpriseto a version that resolves this vulnerability.Fixed in 9.4.14
Event History
Frequently Asked Questions
Who can exploit this issue, and what conditions are required?
An attacker needs a Splunk account with the "power" role. They must be able to create a malicious ui-tour knowledge object whose name matches an auto-tour page and share it at the app level.
Which users are at risk from a malicious tour object?
Another authenticated user is at risk when they visit a standard Splunk Web page that resolves the attacker-controlled auto-tour entry. The resulting JavaScript runs with the affected user's browser-accessible permissions.
How can I determine whether an installation requires remediation?
Installations running Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, or 9.4.14 are affected. The vulnerability depends on app-level ui-tour objects created by users holding the "power" role.