CVE-2026-20254

Name of the Vulnerable Software and Affected Versions Splunk Enterprise versions prior to 10.2.4 Splunk Enterprise versions prior to 10.0.7 Splunk Enterprise versions prior to 9.4.12 Splunk Enterprise versions prior to 9.3.13 Splunk Cloud Platform versions prior to 10.3.2512.13 Splunk Cloud Platform versions prior to 10.2.2510.15 Splunk Cloud Platform versions prior to 10.1.2507.23 Splunk Cloud Platform versions prior to 9.3.2411.132

Description A low-privileged user without 'admin' or 'power' roles can create a malicious classic dashboard that exfiltrates sensitive data and credentials to an external server when viewed by a higher-privileged user. This is possible because the Trusted Domains security check fails to fully validate inline style attribute values, allowing a Cascading Style Sheets (CSS) injection to bypass external content restrictions and trigger outbound requests to untrusted domains.

Recommendations Update Splunk Enterprise to version 10.2.4 or later. Update Splunk Enterprise to version 10.0.7 or later. Update Splunk Enterprise to version 9.4.12 or later. Update Splunk Enterprise to version 9.3.13 or later. Update Splunk Cloud Platform to version 10.3.2512.13 or later. Update Splunk Cloud Platform to version 10.2.2510.15 or later. Update Splunk Cloud Platform to version 10.1.2507.23 or later. Update Splunk Cloud Platform to version 9.3.2411.132 or later.