CVE-2026-76268 Missing Authentication for Critical Function in the Patroni REST API in Splunk Enterprise
Unauthenticated attackers can execute arbitrary OS commands via the Patroni REST API in Splunk Enterprise search head clusters.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-76268?
CVE-2026-76268 is a critical missing authorization vulnerability in Splunk Splunk, published on 7 Oct 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-306
Which versions are affected by CVE-2026-76268?
It affects 1 product.
Products include Splunk Splunk.
How do I fix CVE-2026-76268?
No fix has been published for CVE-2026-76268 yet. Limit exposure of the affected software until one is available.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-76268 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-76268 exists.
Public exploit code: 1 Nuclei template and 1 proofs of concept on GitHub.
Other vulnerabilities in Splunk Splunk
Sources
Also known as GHSA-rxjh-rj2v-47gx.