11/03/2025 | Press release | Distributed by Public on 11/03/2025 14:32
          Commission File Number of issuing entity:  333-206582-12
        
Central Index Key Number of Issuing entity: 0001718322
          BANK 2017-BNK8
          (Exact name of issuing entity as specified in its charter)
        
Commission File Number of depositor: 333-206582
Central Index Key Number of depositor: 0001547361
          Morgan Stanley Capital I Inc.
          (Exact name of depositor as specified in its charter)
        
Central Index Key Number of sponsor (if applicable): 0001102113
            Bank of America, National Association
            (Exact name of Sponsor as specified in its charter)
          
Central Index Key Number of sponsor (if applicable): 0000740906
            Wells Fargo Bank, National Association
            (Exact name of Sponsor as specified in its charter)
          
Central Index Key Number of sponsor (if applicable): 0001541557
            Morgan Stanley Mortgage Capital Holdings LLC
            (Exact name of Sponsor as specified in its charter)
          
Central Index Key Number of sponsor (if applicable): 0001577313
            National Cooperative Bank, N.A.
            (Exact name of Sponsor as specified in its charter)
          
          Jane Lam (212) 761-4000
          (Name and telephone number, including area code, of the person to contact in connection with this filing)
        
INFORMATION TO BE INCLUDED IN THIS FORM
Item 1. File an Asset Data File in accordance with Exhibit 601(b)(102) (17 CFR 229.601(b)(102)).
Item 2. File an Asset Related Document in accordance with Exhibit 601(b)(103) (17 CFR 229.601(b)(103)).
SIGNATURES
The depositor has duly caused this Form to be signed on its behalf by the undersigned hereunto duly authorized.
          Morgan Stanley Capital I Inc.
          (Depositor)
        
            /s/ Jane Lam
            Jane Lam, President
          
October 31, 2025
EXHIBIT INDEX
| Exhibit Number | Description | 
| EX 102 | Asset Data File | 
| EX 103 | Asset Related Document |