CVE-2026-76288
Denial of Service (DoS) through Splunk Web Content-Type Header Parsing in Splunk Enterprise
Exploited
Not listed
EPSS
—
Discovered by
Not disclosed
Published
Oct 21, 2026
Assigned by cisco
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.
Weakness: CWE-400
Affected products
| Vendor | Product | Category | Matched by |
|---|---|---|---|
| Cisco | Splunk Enterprise | SIEM & Log Management | cna-assigner |
Vendor-reported products (1)
- Splunk · Splunk Enterprise
Credit
Pedro Cardoso (tvmpt)
Vendor remediation
Upgrade Splunk Enterprise to versions 10.4.4, 10.2.8, 10.0.11, and 9.4.16 or higher.