What’s Vulnerable › Vulnerabilities

CVE-2026-76268: Missing Authentication for Critical Function in the Patroni REST API in Splunk Enterprise

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 4.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-10-07 · updated 2026-10-14
• Weakness: CWE-306

Description

In Splunk Enterprise versions below 10.4.3 and 10.2.7, an unauthenticated user with network access to the Patroni Representational State Transfer (REST) Application Programming Interface (API) on a search head cluster member could execute attacker-controlled operating-system commands. The vulnerability is possible because this interface does not require authentication for critical configuration operations. For more information see Sidecar configuration settings (https://help.splunk.com/en/data-management/splunk-enterprise-admin-manual/10.2/splunk-sidecars/sidecar-configuration-settings) in the Splunk documentation. Splunk Enterprise versions 10.0.x and 9.4.x are not affected.

Affected products

• Splunk Enterprise: from 10.2.0 before 10.2.7; from 10.4.0 before 10.4.3 — fixed in 10.2.7, 10.4.3

How to fix

Upgrade to a fixed version: Splunk Enterprise 10.2.7, 10.4.3. Check the vendor advisory for mitigations.

In the news

• CVE-2026-76268 | Splunk Enterprise Patroni REST API Missing Authentication Vulnerability

References

• https://advisory.splunk.com/advisories/SVD-2026-1001

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