Description
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.
Published: 2026-10-21
Score: 6.5 Medium
EPSS: < 1% Very Low
KEV: No
Impact: Denial of Service
Action: Patch Now
AI Analysis

Impact

The vulnerability allows a user without admin or power roles to issue a request to the REST API endpoint that handles lookup table files. Because the endpoint does not restrict resource usage based on response field selections, repeated or crafted requests can exhaust the instance’s resources, resulting in a service outage for all users. This denial of service disables normal Splunk operations until the instance is restarted.

Affected Systems

The affected product is Splunk Enterprise. Versions prior to 10.4.4, 10.2.8, 10.0.11, and 9.4.16 are impacted. Only users lacking higher privileged roles can trigger the issue. Administrators should ensure that their installation is updated beyond these thresholds.

Risk and Exploitability

The CVSS score of 6.5 indicates moderate severity, and the EPSS score is not available while the vulnerability is not in the CISA KEV catalog. The likely attack vector is an authenticated user with a limited role sending API requests. Because the flaw is exploitable without special privileges beyond normal user access, an insider or compromised account could cause a DoS, potentially impacting availability for the broader user base. Patched versions mitigate the flaw by limiting resource usage.

Generated by OpenCVE AI on October 22, 2026 at 04:07 UTC.

Remediation

Vendor Solution

Upgrade Splunk Enterprise to versions 10.4.4, 10.2.8, 10.0.11, and 9.4.16 or higher.


OpenCVE Recommended Actions

  • Upgrade Splunk Enterprise to version 10.4.4, 10.2.8, 10.0.11, 9.4.16 or higher.
  • Restrict the REST API lookup table endpoint for users lacking admin or power roles by adjusting role‑based access controls.
  • If an immediate upgrade is not possible, restart the Splunk instance to restore service and monitor for repeated API invocations.

Generated by OpenCVE AI on October 22, 2026 at 04:07 UTC.

Tracking

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Advisories

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History

Fri, 30 Oct 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Splunk splunk
CPEs cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*
Vendors & Products Splunk splunk

Thu, 22 Oct 2026 14:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Thu, 22 Oct 2026 05:15:00 +0000

Type Values Removed Values Added
First Time appeared Splunk
Splunk splunk Enterprise
Vendors & Products Splunk
Splunk splunk Enterprise

Wed, 21 Oct 2026 23:00:00 +0000

Type Values Removed Values Added
Description 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.
Title Denial of Service (DoS) through the REST API in Splunk Enterprise
Weaknesses CWE-770
References
Metrics cvssV3_1

{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H'}


Subscriptions

Splunk Splunk Splunk Enterprise
cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-10-22T13:37:48.707Z

Reserved: 2026-08-19T12:02:03.622Z

Link: CVE-2026-76289

cve-icon Vulnrichment

Updated: 2026-10-22T13:34:05.302Z

cve-icon NVD

Status : Analyzed

Published: 2026-10-21T23:17:26.687

Modified: 2026-10-30T20:46:13.247

Link: CVE-2026-76289

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-22T05:00:11Z

Weaknesses
  • CWE-770

    Allocation of Resources Without Limits or Throttling