Resource exhaustion in Splunk Enterprise - CVE-2026-76288
Published: October 22, 2026
Vulnerability identifier: #VU156972
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-76288
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to cause a denial of service by making Splunk Web stop responding to requests.
The vulnerability exists due to unrestricted resource consumption in Splunk Web request-header parsing when processing requests to the JavaScript logger endpoint. A remote attacker can send a single request with a specially crafted Content-Type header to make Splunk Web unavailable.
Affected software
Splunk Enterprise
How to mitigate CVE-2026-76288
Install security update from vendor's website.
Splunk Enterprise - addressed in versions 9.4.16, 10.0.11, 10.2.8, 10.4.4