VA loan forbearance under the CARES Act will not hurt your credit score. The CARES Act protections specifically state that you will not face adverse credit reporting due to a pandemic-related forbearance.
That said, your credit score may be adversely affected if you were already past due on your mortgage payments prior to the forbearance request. In some cases, your mortgage company might be required to maintain the delinquent status until your past-due payments are made current.