What’s Vulnerable › Vulnerabilities
CVE-2026-76290: Denial of Service (DoS) through Unauthenticated Package Downloads over the REST API in Splunk Enterprise
- Severity: high (CVSS 7.5 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.5% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-10-21 · updated 2026-10-30
- Weakness: CWE-400
Description
In Splunk Enterprise versions below 10.4.4, 10.2.8, and 10.0.11, an unauthenticated user could send repeated requests to the Edge Processor package download endpoint in the Splunk Pipeline Builders app. The requests could cause the Splunk daemon to consume excessive system resources and potentially stop responding. The vulnerability is possible because the endpoint accepts package download requests without authentication and reads and base64-encodes the complete package in memory for each request. After upgrading, prepare all existing Edge Processor instances, turn on authentication for Edge Processor package downloads, and restart Splunk Enterprise. For more information, see Enable authentication for Edge Processor package downloads (https://help.splunk.com/en/data-management/process-data-at-the-edge/use-edge-processors-for-splunk-enterprise/10.4/administer-edge-processors/enable-authentication-for-edge-processor-package-downloads).
Affected products
- Splunk Enterprise: from 10.0.0 before 10.0.11; from 10.2.0 before 10.2.8; from 10.4.0 before 10.4.4 — fixed in 10.0.11, 10.2.8, 10.4.4
- Splunk Enterprise: from 10.4 before 10.4.4; from 10.2 before 10.2.8; from 10.0 before 10.0.11 — fixed in 10.0.11, 10.2.8, 10.4.4
How to fix
Upgrade to a fixed version: Splunk Enterprise 10.0.11, 10.2.8, 10.4.4; Splunk Enterprise 10.0.11, 10.2.8, 10.4.4. Check the vendor advisory for mitigations.
References
Get alerted when CVE-2026-76290 or the next vulnerability affects your stack