CVE-2026-76392: Splunk AI Toolkit Auth Bypass Vulnerability

CVE-2026-76392 Overview

CVE-2026-76392 is a hard-coded credentials vulnerability [CWE-798] affecting Splunk AI Toolkit versions below 6.0.0. The flaw allows a low-privileged Splunk user, one who does not hold the admin or power roles, to obtain predictable or default credentials for connected container services. Splunk AI Toolkit generates or stores credentials for these services using predictable or hard-coded default values. An attacker with a low-privileged Splunk account can leverage these credentials to access connected container services outside their intended authorization scope.

Critical Impact
Low-privileged Splunk users can retrieve predictable credentials for connected container services, leading to unauthorized access to backend AI infrastructure.

Affected Products

Splunk AI Toolkit versions below 6.0.0
Deployments exposing the Connections tab in the AI Toolkit
Environments with non-admin, non-power Splunk role users

Discovery Timeline

2026-08-19 - CVE-2026-76392 published to NVD
2026-08-20 - Last updated in NVD database

Technical Details for CVE-2026-76392

Vulnerability Analysis

The vulnerability resides in how Splunk AI Toolkit provisions and stores authentication material for connected container services. Instead of generating unique, cryptographically strong credentials per deployment, the toolkit relies on predictable or hard-coded default values. Any authenticated Splunk user with visibility into the Connections tab can enumerate or derive these credentials.

The issue is classified under CWE-798: Use of Hard-coded Credentials. Because the credentials are shared across installations or derived from predictable inputs, an attacker does not need to defeat cryptographic controls. They only need low-privileged Splunk access to obtain them.

Exploitation requires network access to the Splunk instance and valid low-privileged credentials. No user interaction is required. Successful exploitation impacts confidentiality and integrity of connected container services, but does not directly affect availability.

Root Cause

Splunk AI Toolkit generates or stores credentials for connected container services using predictable or hard-coded default values. The application does not enforce role-based restrictions preventing non-admin, non-power users from viewing these credentials through the Connections tab interface.

Attack Vector

An authenticated attacker with a standard Splunk user role authenticates to the Splunk web interface. The attacker navigates to the AI Toolkit Connections tab and enumerates connected container services. The predictable or default credentials exposed there allow the attacker to authenticate directly to the backing container services, bypassing the intended Splunk role model.

For technical background on the affected feature, see the Connections tab in the AI Toolkit documentation.

Detection Methods for CVE-2026-76392

Indicators of Compromise

Access to the AI Toolkit Connections tab by users lacking admin or power Splunk roles
Authentication events against connected container services originating from unexpected source addresses
Unusual API calls to connected container services outside normal AI Toolkit workflows
Container service log entries showing successful authentication with default account names

Detection Strategies

Audit Splunk internal logs (_audit index) for access patterns to AI Toolkit endpoints by non-privileged users
Correlate container service authentication logs with Splunk user session activity to identify credential reuse
Monitor for enumeration of the Connections tab through repeated page loads from a single low-privileged account

Monitoring Recommendations

Enable verbose logging on all container services connected to the AI Toolkit
Ingest container service access logs into a centralized SIEM for correlation with Splunk audit events
Establish baselines for normal AI Toolkit usage and alert on deviations from user role expectations

How to Mitigate CVE-2026-76392

Immediate Actions Required

Upgrade Splunk AI Toolkit to version 6.0.0 or later
Rotate all credentials for container services previously connected through vulnerable AI Toolkit versions
Review Splunk user role assignments and remove unnecessary access to the AI Toolkit application
Audit historical access logs for the Connections tab to identify potential credential exposure

Patch Information

Splunk has addressed this vulnerability in AI Toolkit version 6.0.0. Refer to the Splunk Security Advisory SVD-2026-0808 for official patch details and upgrade guidance.

Workarounds

Restrict AI Toolkit application access to only admin and power role users through Splunk role-based access control
Manually replace default credentials on connected container services with strong, unique values
Isolate connected container services on a segmented network reachable only from the Splunk instance

bash

# Restrict AI Toolkit access via Splunk authorize.conf
# /opt/splunk/etc/apps/Splunk_ML_Toolkit/local/authorize.conf
[role_user]
srchIndexesAllowed = 
importRoles = 

[capability::access_ai_toolkit]
# Grant only to admin and power roles