Description
In Splunk Enterprise versions below 10.4.4, 10.2.8, 10.0.11, and 9.4.16, an unauthenticated user could send a single crafted request to the Splunk Web JavaScript logger endpoint and cause Splunk Web to stop responding to requests. Splunk Web remains unavailable until Splunk Enterprise is restarted.
The vulnerability is possible because Splunk Web does not limit request-header parsing before processing the request.
Published: 2026-10-21
Score: 7.5 High
EPSS: < 1% Very Low
KEV: No
AI Analysis

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Remediation

Vendor Solution

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


Vendor Workaround

The vulnerability affects instances with Splunk Web turned on. Turning Splunk Web off is a possible workaround. See [Disable unnecessary Splunk Enterprise components](https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.4/install-splunk-enterprise-securely/disable-unnecessary-splunk-enterprise-components) and the [web.conf](https://help.splunk.com/en/splunk-enterprise/administer/admin-manual/10.4/configuration-file-reference/10.4.1-configuration-file-reference/web.conf) configuration specification file for more information on turning off Splunk Web.

Tracking

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Advisories

No advisories yet.

History

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

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', '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, an unauthenticated user could send a single crafted request to the Splunk Web JavaScript logger endpoint and cause Splunk Web to stop responding to requests. Splunk Web remains unavailable until Splunk Enterprise is restarted. The vulnerability is possible because Splunk Web does not limit request-header parsing before processing the request.
Title Denial of Service (DoS) through Splunk Web Content-Type Header Parsing in Splunk Enterprise
Weaknesses CWE-400
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H'}


Subscriptions

Splunk Splunk Enterprise
cve-icon MITRE

Status: PUBLISHED

Assigner: cisco

Published:

Updated: 2026-10-22T13:37:48.847Z

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

Link: CVE-2026-76288

cve-icon Vulnrichment

Updated: 2026-10-22T13:34:12.166Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-10-21T23:17:26.537

Modified: 2026-10-22T16:57:10.180

Link: CVE-2026-76288

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-10-22T06:00:14Z

Weaknesses