{"id":"CVE-2026-76288","title":"Denial of Service (DoS) through Splunk Web Content-Type Header Parsing in Splunk Enterprise","summary":"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…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cvssSource":"cna","cwe":["CWE-400"],"vendor":"Splunk","product":"Splunk Enterprise","affected":["enterprise >= 10.4 < 10.4.4","enterprise >= 10.2 < 10.2.8","enterprise >= 10.0 < 10.0.11","enterprise >= 9.4 < 9.4.16"],"published":"2026-10-21","updated":"2026-10-21","sourceUpdated":"2026-10-21T22:51:50.487Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-76288","references":[{"url":"https://advisory.splunk.com/advisories/SVD-2026-1007"}],"tags":["cve.org"],"ingestedAt":"2026-10-21T23:20:10.328Z","slug":"CVE-2026-76288","body":"## Overview\n\nIn 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.\nThe vulnerability is possible because Splunk Web does not limit request-header parsing before processing the request.\n\n## Affected\n\n- `enterprise >= 10.4 < 10.4.4`\n- `enterprise >= 10.2 < 10.2.8`\n- `enterprise >= 10.0 < 10.0.11`\n- `enterprise >= 9.4 < 9.4.16`\n\n## Remediation\n\nUpgrade Splunk Enterprise to versions 10.4.4, 10.2.8, 10.0.11, and 9.4.16 or higher.\n\n### Workarounds\n\nThe vulnerability affects instances with Splunk Web turned on. Turning Splunk Web off is a possible workaround.\nSee [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.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[]}