{"record":{"id":"86ada563ddd214e8","repo":"sqlmapproject/sqlmap","slug":"server-does-not-support-the-4-1-protocol-which-th","errorCode":null,"errorMessage":"server does not support the 4.1 protocol, which this client requires","messagePattern":"server does not support the 4\\.1 protocol, which this client requires","errorType":"exception","errorClass":"OperationalError","httpStatus":null,"severity":"error","filePath":"extra/dbwire/mysql.py","lineNumber":323,"sourceCode":"        off += 10                                       # reserved\n        salt += payload[off:off + max(13, auth_data_len - 8) - 1]  # part 2 (drop trailing NUL)\n        off += max(13, auth_data_len - 8)\n        plugin = \"mysql_native_password\"\n        if off < len(payload):\n            name, _ = _cstring(payload, off)\n            plugin = name.decode(\"ascii\", \"replace\") or plugin\n\n        if plugin == \"caching_sha2_password\":\n            auth_response = _scramble_sha2(password or \"\", salt)\n        else:\n            plugin = \"mysql_native_password\"\n            auth_response = _scramble_native(password or \"\", salt)\n\n        # capabilities are NEGOTIATED: each side advertises what it can do and only the intersection is in\n        # play. Sending a fixed set makes the client claim features a proxy/fork/older server never offered,\n        # which is how a handshake ends up desynchronized rather than cleanly refused.\n        if not (server_caps & _CLIENT_PROTOCOL_41):\n            raise OperationalError(\"server does not support the 4.1 protocol, which this client requires\")\n        wanted = (_CLIENT_LONG_PASSWORD | _CLIENT_LONG_FLAG | _CLIENT_PROTOCOL_41 |\n                  _CLIENT_TRANSACTIONS | _CLIENT_SECURE_CONNECTION | _CLIENT_PLUGIN_AUTH)\n        if database:\n            wanted |= _CLIENT_CONNECT_WITH_DB\n        flags = wanted & server_caps\n        flags |= _CLIENT_PROTOCOL_41 | _CLIENT_SECURE_CONNECTION     # mandatory for the packets built below\n        if database and not (flags & _CLIENT_CONNECT_WITH_DB):\n            raise OperationalError(\"server does not support selecting a database during the handshake\")\n        if not (flags & _CLIENT_PLUGIN_AUTH):\n            plugin = None       # pre-4.1.1 style: no trailing plugin name in the handshake response\n        response = struct.pack(\"<I\", flags) + struct.pack(\"<I\", _MAX_PACKET) + struct.pack(\"<B\", 45) + (b\"\\x00\" * 23)\n        response += (user or \"\").encode(\"utf-8\") + b\"\\x00\"\n        response += struct.pack(\"<B\", len(auth_response)) + auth_response\n        if database:\n            response += database.encode(\"utf-8\") + b\"\\x00\"\n        if plugin:\n            response += plugin.encode(\"ascii\") + b\"\\x00\"\n        _send_packet(sock, seq + 1, response)","sourceCodeStart":305,"sourceCodeEnd":341,"githubUrl":"https://github.com/sqlmapproject/sqlmap/blob/0a35b20e3953d341be6c7ac75ccb0b3362540c8d/extra/dbwire/mysql.py#L305-L341","documentation":"Error \"server does not support the 4.1 protocol, which this client requires\" thrown in sqlmapproject/sqlmap.","triggerScenarios":"Thrown at extra/dbwire/mysql.py:323 when the library encounters an invalid state.","commonSituations":"See trigger scenarios.","solutions":[],"exampleFix":null,"handlingStrategy":null,"validationCode":null,"typeGuard":null,"tryCatchPattern":null,"preventionTips":[],"tags":[],"backgroundTag":null,"analyzedSha":"0a35b20e3953d341be6c7ac75ccb0b3362540c8d","analyzedAt":"2026-08-26T23:02:52.002Z","schemaVersion":2},"datasetVersion":"2026-08-27T03:17:27.898Z"}