What’s Vulnerable › Vulnerabilities

CVE-2026-76256: Information Exposure through REST API Endpoints in Splunk Secure Gateway

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-08-19 · updated 2026-10-26
• Weakness: CWE-200

Description

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 sensitive Security Assertion Markup Language setup and instance settings information through Splunk Secure Gateway Representational State Transfer (REST) API endpoints. The vulnerability is possible because the affected Security Assertion Markup Language setup and instance settings REST API endpoints do not enforce authorization requirements before returning configuration information.

Affected products

• Splunk Enterprise: from 9.4.0 before 9.4.14; from 10.0.0 before 10.0.9; from 10.2.0 before 10.2.6; from 10.4.0 before 10.4.2 — fixed in 9.4.14, 10.0.9, 10.2.6, 10.4.2
• Splunk Secure Gateway: from 3.8.0 before 3.8.70; from 3.9.0 before 3.9.23; from 3.10.0 before 3.10.9 — fixed in 3.8.70, 3.9.23, 3.10.9

How to fix

Upgrade to a fixed version: Splunk Enterprise 9.4.14, 10.0.9, 10.2.6, 10.4.2; Splunk Secure Gateway 3.8.70, 3.9.23, 3.10.9. Check the vendor advisory for mitigations.

References

• https://advisory.splunk.com/advisories/SVD-2026-0801

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