Vulnerability 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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Splunk | Splunk | >= 9.4.0, < 9.4.16 |
Related Weaknesses (CWE)
References
- https://advisory.splunk.com/advisories/SVD-2026-1007Vendor AdvisoryMitigation
FAQ
What is CVE-2026-76288?
CVE-2026-76288 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 t...
How severe is CVE-2026-76288?
CVE-2026-76288 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-76288?
Check the references section above for vendor advisories and patch information. Affected products include: Splunk Splunk.