CVE-2026-76288: high-severity vulnerability in Splunk Enterprise
Denial of Service (DoS) through Splunk Web Content-Type Header Parsing in Splunk Enterprise
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 7.5epss 0.5%
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Splunk · Splunk EnterpriseRelated CVEs — Splunk Enterprise
In the same product, most dangerous first.
CVE-2026-20253CRITICALUnauthenticated Arbitrary File Creation and Truncation in a PostgreSQL Sidecar Service Endpoint in Splunk EnterpriseEPSS 96.9%KEVCVE-2023-46214HIGHRemote code execution (RCE) in Splunk Enterprise through Insecure XML ParsingEPSS 89.2%CVE-2023-32707HIGH‘edit_user’ Capability Privilege EscalationEPSS 78.7%CVE-2022-43568HIGHReflected Cross-Site Scripting via the radio template in Splunk EnterpriseEPSS 42.8%CVE-2026-20251HIGHRemote Code Execution through Deserialization of Untrusted Data in Splunk Secure GatewayEPSS 32.2%CVE-2025-20297MEDIUMReflected Cross-Site Scripting (XSS) on Splunk Enterprise through dashboard PDF generation componentEPSS 31.2%