CVE-2026-20259: Splunk

Medium severity, CVSS 5.5. EPSS: 0.2% chance of exploitation in the next 30 days.

In Splunk Enterprise versions below 10.2.4 and 10.0.7, and Splunk Cloud Platform versions below 10.4.2604.0, 10.3.2512.12, 10.2.2510.15, 10.1.2507.23, 10.0.2503.14, and 9.3.2411.131, a user who holds a Splunk role that contains the high-privilege capability `edit_saved_search_owner` could reassign saved search ownership to users outside their authorized scope. The ownership reassignment endpoint lacks access control.

Affected products

• Splunk Splunk: from 10.0.0, before 10.0.7 (fixed in 10.0.7); from 10.2.0, before 10.2.4 (fixed in 10.2.4)
• Splunk Splunk Cloud Platform: from 9.3.2411, before 9.3.2411.131 (fixed in 9.3.2411.131); from 10.0.2503, before 10.0.2503.14 (fixed in 10.0.2503.14); from 10.1.2507, before 10.1.2507.23 (fixed in 10.1.2507.23); from 10.2.2510, before 10.2.2510.15 (fixed in 10.2.2510.15); from 10.3.2512, before 10.3.2512.12 (fixed in 10.3.2512.12)

Published 2026-06-10. Last modified 2026-06-17.