Onyx: Cross-user OAuth-token leak via /api/mcp/servers* for per-user MCP servers
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | ||||||||||||
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| onyx-dot-app | onyx | affected |
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No data.
No data.
| Vendor | Product | Versions | ||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Onyx | Onyx |
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No CVSS v4.0
No CVSS v3.0
No CVSS v2
This CVE is not in the KEV list.
Exploit prediction score: < 1% (0.488% probability within 30 days)
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| Metrics |
ssvc
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| First Time appeared |
Onyx
Onyx onyx |
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| Vendors & Products |
Onyx
Onyx onyx |
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| Description | 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. | |
| Title | Onyx: Cross-user OAuth-token leak via /api/mcp/servers* for per-user MCP servers | |
| Weaknesses | CWE-200 CWE-863 |
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| References |
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| Metrics |
cvssV3_1
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