CVE-2026-76257 PUBLISHED

Missing Authorization through REST API Endpoints in Splunk Secure Gateway

Assigner: cisco
Reserved: 19.08.2026 Published: 19.08.2026 Updated: 19.08.2026

In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, and Splunk Secure Gateway versions below 3.10.10, 3.9.24, and 3.8.71, a user who holds a Splunk role with permissions to list storage passwords but does not hold Splunk Secure Gateway administration privileges could access Mobile Device Management signing secrets that compromise all affected mobile-device enrollment trust through Splunk Secure Gateway. The vulnerability is possible because Splunk Secure Gateway Representational State Transfer (REST) API endpoints for deployment bundle, Security Assertion Markup Language setup, and companion app workflows do not require Splunk Secure Gateway administration privileges before processing requests.

Metrics

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS Score: 6.5

Product Status

Vendor Splunk
Product Splunk Enterprise
Versions
  • affected from 10.4 to 10.4.2 (excl.)
  • affected from 10.2 to 10.2.6 (excl.)
  • affected from 10.0 to 10.0.9 (excl.)
  • affected from 9.4 to 9.4.14 (excl.)
Vendor Splunk
Product Splunk Secure Gateway
Versions
  • affected from 3.10 to 3.10.10 (excl.)
  • affected from 3.9 to 3.9.24 (excl.)
  • affected from 3.8 to 3.8.71 (excl.)

Workarounds

Upgrade Splunk Secure Gateway to versions 3.10.10, 3.9.24, and 3.8.71, or higher. If you are not able to upgrade Splunk Enterprise or Splunk Secure Gateway, turn off or remove the Splunk Secure Gateway app. See Manage app and add-on objects in the Splunk documentation. Note: Splunk Mobile, Spacebridge, and Mission Control rely on functionality in the Splunk Secure Gateway app. If you do not use any of these apps, features, or functionality, as a potential mitigation, you may turn off or remove the app.

Solutions

Upgrade Splunk Enterprise to versions 10.4.2, 10.2.6, 10.0.9, and 9.4.14, or higher.

Credits

  • Gabriel Nitu, Splunk reporter

References

Problem Types

  • The software does not perform an authorization check when an actor attempts to access a resource or perform an action. cwe