CVE-2026-76346
MediumCVSS 5.4Exploitation Probability (EPSS)
Low risk8th percentile - higher than 8% of all known CVEs
Summary
In Splunk Enterprise below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, a user with power role could store a malicious script in dashboard sparkline format options and execute unauthorized JavaScript in another user's browser. If the victim has admin role, the script could access all data and perform actions with admin permissions. The vulnerability is due to lack of restrictions on visualization options and missing escaping of tooltip values.
Risk Assessment
The risk includes session hijacking of an admin user, potentially leading to full data compromise and actions in Splunk Web.
Recommendation
Upgrade Splunk Enterprise to 10.4.2 or later and restrict power role permissions. Educate users about the risk of opening suspicious dashboards.
Original NVD description (English source)
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 script in dashboard sparkline format options and execute unauthorized JavaScript in the browser of another user who views the dashboard. If the other user holds the "admin" Splunk role, the script could access all relevant data available through Splunk Web and perform actions with that user's permissions. The vulnerability is possible because Splunk Web does not limit the permitted dashboard visualization options to safe presentation settings and does not escape tooltip values before rendering them. The vulnerability requires the attacker to phish the affected user by tricking them into initiating a request within their browser. The user who holds the "power" Splunk role should not be able to exploit the vulnerability at will. For more information see About configuring role-based user access (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.2/manage-splunk-platform-users-and-roles/about-configuring-role-based-user-access) in the Splunk documentation.