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CVE-2026-76272: Missing Access Control through the REST API in Splunk Secure Gateway

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-07 · updated 2026-10-14
• Weakness: CWE-862

Description

In Splunk Enterprise versions below 10.4.3, 10.2.7, 10.0.10, and 9.4.15, a user who does not hold the "admin" or "power" Splunk roles could cause Splunk Secure Gateway to sign attacker-controlled payloads. The vulnerability is possible because Splunk Secure Gateway does not verify that the user is authorized to request a signature. Splunk Secure Gateway versions below 3.10.11, 3.9.25, and 3.8.72 are also affected. For more information see Define roles on the Splunk platform with capabilities (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.2/manage-splunk-platform-users-and-roles/define-roles-on-the-splunk-platform-with-capabilities) in the Splunk documentation.

Affected products

• Splunk Enterprise: from 9.4.0 before 9.4.15; from 10.0.0 before 10.0.10; from 10.2.0 before 10.2.7; from 10.4.0 before 10.4.3 — fixed in 10.0.10, 10.2.7, 10.4.3, 9.4.15
• Splunk Secure Gateway: from 3.8.0 before 3.8.72; from 3.9.0 before 3.9.25; from 3.10.0 before 3.10.11 — fixed in 3.10.11, 3.8.72, 3.9.25

How to fix

Upgrade to a fixed version: Splunk Enterprise 10.0.10, 10.2.7, 10.4.3, 9.4.15; Splunk Secure Gateway 3.10.11, 3.8.72, 3.9.25. Check the vendor advisory for mitigations.

References

• https://advisory.splunk.com/advisories/SVD-2026-1001

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