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.
{
"cna_assigner": "GitHub_M",
"cwe_ids": [
"CWE-200",
"CWE-863"
],
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71424.json"
}{
"extracted_events": [
{
"range": [
{
"introduced": "0"
},
{
"fixed": "3.1.10"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"introduced": "3.2.0"
},
{
"fixed": "3.2.14"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"introduced": "3.3.0-beta.0"
},
{
"fixed": "4.0.0"
}
],
"source": "AFFECTED_FIELD",
"strategy": "StringRangeExpression"
},
{
"range": [
{
"fixed": "3f3d79d1a7722fdc84a1c61c8aa830d890017e9e"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "4001cedd0a8968723bfe95dd188914ed56777910"
}
],
"source": "REFERENCES_COMMIT"
},
{
"range": [
{
"fixed": "b103937888fd5008067c2bb6eb6e5424576394f2"
}
],
"source": "REFERENCES_COMMIT"
},
{
"original_tag": "v4.0.0",
"range": [
{
"fixed": "d59882f006ba6d060fecfbbfd79aeadd372905d8"
}
],
"source": "REFERENCES_TAG"
}
]
}