Splunk Enterprise/Splunk Secure Gateway access control

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Splunk Enterprise and Splunk Secure Gateway. Impacted is an unknown function. This manipulation causes access control. This vulnerability is handled as CVE-2026-76261. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability was found in Splunk Enterprise and Splunk Secure Gateway (affected version unknown). It has been declared as problematic. Affected by this vulnerability is an unknown functionality. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. As an impact it is known to affect confidentiality. The summary by CVE is:

In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, and Splunk Secure Gateway versions below 3.10.9, 3.9.23, and 3.8.70, a user who does not hold the "admin" or "power" Splunk roles could read Spacebridge asymmetric private keys, which are secrets that compromise affected Spacebridge private-key material stored in the app collection, through the Splunk Secure Gateway App Key Value Store Representational State Transfer (REST) API. The vulnerability is possible on instances upgraded from older Splunk Secure Gateway deployments when the private-key migration remains incomplete, leaving key material in a collection with an insecure default access control list.

The advisory is shared at advisory.splunk.com. This vulnerability is known as CVE-2026-76261 since 08/19/2026. The exploitation appears to be easy. The attack can be launched remotely. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 08/20/2026). MITRE ATT&CK project uses the attack technique T1068 for this issue.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• Log Management Software

Vendor

• Splunk

Name

• Enterprise
• Splunk Secure Gateway

License

• commercial

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