CVE-2026-71424
Published:August 17, 2026
Updated:August 31, 2026
Onyx is an open-source AI platform. Prior to 3.1.10, 3.2.14, and 4.0.0, Onyx's GET /api/mcp/servers and GET /api/mcp/servers/persona/{persona_id} endpoints expose another user's OAuth Authorization header because OnyxTokenStorage.set_tokens and OnyxTokenStorage.set_client_info in backend/onyx/server/features/mcp/api.py copy per-user tokens into a shared admin MCPConnectionConfig row and _db_mcp_server_to_api_mcp_server returns that row through auth_template.headers to any BASIC_ACCESS user. This issue is fixed in versions 3.1.10, 3.2.14, and 4.0.0.
Affected Packages
https://github.com/onyx-dot-app/onyx.git (GITHUB):
Affected version(s) >=v3.2.0 <v3.2.14Fix Suggestion:
Update to version v3.2.14https://github.com/onyx-dot-app/onyx.git (GITHUB):
Affected version(s) >=v0.0.1-testing <v3.1.10Fix Suggestion:
Update to version v3.1.10https://github.com/onyx-dot-app/onyx.git (GITHUB):
Affected version(s) >=v3.3.0 <v4.0.0Fix Suggestion:
Update to version v4.0.0Related Resources (10)
Do you need more information?
Contact UsCVSS v4
Base Score:
9.3
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
LOW
User Interaction
NONE
Vulnerable System Confidentiality
HIGH
Vulnerable System Integrity
HIGH
Vulnerable System Availability
NONE
Subsequent System Confidentiality
HIGH
Subsequent System Integrity
HIGH
Subsequent System Availability
NONE
CVSS v3
Base Score:
9.6
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
CHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
NONE
Weakness Type (CWE)
EPSS
Base Score:
0.29