Denial of Service (DoS) through Splunk Web Content-Type Header Parsing in Splunk Enterprise
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.
CVE-2026-76288
Primary source · Revision 1
Imported from structured advisory data. Source references identify upstream records or fields; verify affected versions and your deployed configuration.
Security context
Source reference: cve:CVE-2026-76288
Splunk Enterprise
Source reference: /containers/cna/affected/0/product
- Affected versions
- Not stated in this record
- Fixed versions
- Not stated in this record
- Prerequisites
- Not stated in this record
Structured affected-version data
Original package identities and version rules from this source.
[
{
"vendor": "Splunk",
"modules": [
"Splunk Web"
],
"product": "Splunk Enterprise",
"versions": [
{
"status": "affected",
"version": "10.4",
"lessThan": "10.4.4",
"versionType": "custom"
},
{
"status": "affected",
"version": "10.2",
"lessThan": "10.2.8",
"versionType": "custom"
},
{
"status": "affected",
"version": "10.0",
"lessThan": "10.0.11",
"versionType": "custom"
},
{
"status": "affected",
"version": "9.4",
"lessThan": "9.4.16",
"versionType": "custom"
}
]
}
]- Related CVEs
- CVE-2026-76288
Source reference:
/cveMetadata/cveId
Publisher severity
high
Source reference: /containers/cna/metrics
- Event
- #50248 · Revision 1
- Added to Heist Feed
- Publisher date