CVE-2026-76256

Received Received - Intake

Information Disclosure in Splunk Enterprise via REST API

Publication date: 2026-08-19

Last updated on: 2026-08-19

Assigner: Cisco Systems, Inc.

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.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-19

Last Modified

2026-08-19

Generated

2026-08-20

AI Q&A

2026-08-20

EPSS Evaluated

N/A

NVD

CVE-2026-76256

EUVD

EUVD-2026-63108

Affected Vendors & Products

Vendor	Product	Version / Range
splunk	splunk_enterprise	to 10.4.2 (exc)
splunk	splunk_enterprise	to 10.2.6 (exc)
splunk	splunk_enterprise	to 10.0.9 (exc)
splunk	splunk_enterprise	to 9.4.14 (exc)
splunk	splunk_secure_gateway	to 3.10.9 (exc)
splunk	splunk_secure_gateway	to 3.9.23 (exc)
splunk	splunk_secure_gateway	to 3.8.70 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-200	The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.

Attack-Flow Graph

Executive Summary

This vulnerability affects Splunk Enterprise and Splunk Secure Gateway. It allows non-admin or non-power users to read sensitive SAML setup and instance settings via REST API endpoints due to missing authorization checks.

Impact Analysis

An attacker with limited access could exploit this to view confidential configuration details, potentially leading to further attacks or data exposure.

Compliance Impact

This could violate compliance by exposing sensitive data, leading to unauthorized access to security settings and potential breaches of confidentiality requirements.

Mitigation Strategies

Upgrade Splunk Enterprise to versions 10.4.2, 10.2.6, 10.0.9, or 9.4.14, and Splunk Secure Gateway to versions 3.10.9, 3.9.23, or 3.8.70 or later to address the authorization bypass in REST API endpoints.

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