Splunk Enterprise DoS via REST API Lookup Endpoint (10.4.4,10.2.8,10.0.11,9.4.16)
CVE-2026-76289 Published on October 21, 2026
Denial of Service (DoS) through the REST API in Splunk Enterprise
In Splunk Enterprise versions below 10.4.4, 10.2.8, 10.0.11, and 9.4.16, a user who does not hold the "admin" or "power" Splunk roles could make the Splunk Enterprise instance unavailable to other users by sending a request to the Representational State Transfer (REST) API endpoint for lookup table files. The affected instance requires a restart to restore service.
The vulnerability is possible because the endpoint does not limit resource use when it processes response field selections.
For more information see Endpoints reference list (https://help.splunk.com/en/splunk-enterprise/rest-api-reference/10.4/introduction/endpoints-reference-list) 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.
Weakness Type
Allocation of Resources Without Limits or Throttling
The software allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor.
Products Associated with CVE-2026-76289
Want to know whenever a new CVE is published for Splunk? stack.watch will email you.
Affected Versions
Splunk Enterprise:- Version 10.4 and below 10.4.4 is affected.
- Version 10.2 and below 10.2.8 is affected.
- Version 10.0 and below 10.0.11 is affected.
- Version 9.4 and below 9.4.16 is affected.