CVE-2026-76280: Splunk Enterprise

Medium severity, CVSS 6.3. EPSS: 0.2% chance of exploitation in the next 30 days.

In Splunk Enterprise versions below 10.4.3, 10.2.7, 10.0.10, and 9.4.15, and Splunk Secure Gateway versions below 3.10.11, 3.9.25, and 3.8.72, an authenticated user who does not hold the "admin" or "sc_admin" Splunk roles could modify Splunk Secure Gateway alert and mobile-device recipient data in App Key Value Store (KV Store) collections that later alert and subscription workflows use. The vulnerability is possible because the affected collections allow unrestricted write access instead of limiting writes to authorized Splunk Secure Gateway workflows. For more information see About the app key value store (https://help.splunk.com/en/splunk-enterprise/administer/admin-manual/10.4/administer-the-app-key-value-store/about-the-app-key-value-store), KV store endpoint descriptions (https://help.splunk.com/en/splunk-enterprise/leverage-rest-apis/rest-api-reference/10.4/kv-store-endpoints/kv-store-endpoint-descriptions), and About configuring role-based user access (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.4/manage-splunk-platform-users-and-roles/about-configuring-role-based-user-access) in the Splunk documentation.

Affected products

• Splunk Splunk Enterprise: from 10.4, before 10.4.3 (fixed in 10.4.3); from 10.2, before 10.2.7 (fixed in 10.2.7); from 10.0, before 10.0.10 (fixed in 10.0.10); from 9.4, before 9.4.15 (fixed in 9.4.15)
• Splunk Splunk Secure Gateway: from 3.10, before 3.10.11 (fixed in 3.10.11); from 3.9, before 3.9.25 (fixed in 3.9.25); from 3.8, before 3.8.72 (fixed in 3.8.72)

Published 2026-10-07. Last modified 2026-10-09.