Splunk Enterprise up to 10.4.1 Prometheus metrics endpoint information disclosure

Summaryinfo

A vulnerability described as problematic has been identified in Splunk Enterprise up to 10.4.1. This impacts an unknown function of the component Prometheus metrics endpoint. The manipulation results in information disclosure. This vulnerability was named CVE-2026-76262. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in Splunk Enterprise up to 10.4.1. It has been classified as problematic. Affected is an unknown code block of the component Prometheus metrics endpoint. The manipulation with an unknown input leads to a information disclosure vulnerability. CWE is classifying the issue as CWE-200. The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information. This is going to have an impact on confidentiality. CVE summarizes:

In Splunk Enterprise 10.4 versions below 10.4.2, an unauthenticated user could read Prometheus service metrics from the Edge Processor SPL2 Preview sidecar, including service details that expose relevant runtime and build metadata for the sidecar. The vulnerability does not affect Splunk Enterprise versions below 10.4. The information disclosure is possible because the Prometheus metrics endpoint in the Edge Processor SPL2 Preview sidecar lacks authentication, which lets any client that can reach the sidecar retrieve the metrics without credentials. For more information see About Splunk sidecars (https://help.splunk.com/en/splunk-enterprise/administer/admin-manual/10.4/splunk-sidecars/about-splunk-sidecars) in the Splunk documentation.

The advisory is shared for download at advisory.splunk.com. This vulnerability is traded as CVE-2026-76262 since 08/19/2026. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1592.

Upgrading to version 10.4.2 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Log Management Software

Vendor

• Splunk

Name

• Enterprise

Version

• 10.4.0
• 10.4.1

License

• commercial

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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