CVE-2026-76288 json
Denial of Service (DoS) through Splunk Web Content-Type Header Parsing in Splunk Enterprise
published 2026-10-21 18 d ago modified 2026-10-30 9 d ago also EUVD-2026-107663
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.5%
- EPSS 0.5% chance of exploitation in 30 days, percentile 41%
- public exploits
- 0
- none known
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 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.
Patch / fix
- Splunk Splunk Enterprise 9.4.16, 10.0.11, 10.2.8, 10.4.4
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 17 d ago
Exploit prediction
0.47% chance of exploitation in the next 30 days, higher than 41% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
Affected products
- Splunk Splunk Enterprise
Classification
- Weakness
-
- CWE-400 Uncontrolled Resource Consumption
References
-
advisory.splunk.com
/advisories/SVD-2026-1007
vendor-advisory, mitigation
Sources
- CVE List CVE-2026-76288
- NVD CVE-2026-76288
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