CVE-2026-76288 Denial of Service (DoS) through Splunk Web Content-Type Header Parsing in Splunk Enterprise
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-76288?
CVE-2026-76288 is a high-severity vulnerability in Splunk Enterprise, published on 21 Oct 2026.
Official 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
Which versions are affected by CVE-2026-76288?
How do I fix CVE-2026-76288?
No fix has been published for CVE-2026-76288 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-76288 being exploited?
There is no known exploitation of CVE-2026-76288 in the wild and no public exploit code.
Sources
Also known as GHSA-hcwv-2x2x-8285.