server/src/Core/IdentityServer/VaultCorsPolicyService.cs

using Bit.Core.Settings;
using Bit.Core.Utilities;
using IdentityServer4.Services;

namespace Bit.Core.IdentityServer
{
    public class CustomCorsPolicyService : ICorsPolicyService
    {
        private readonly GlobalSettings _globalSettings;

        public CustomCorsPolicyService(GlobalSettings globalSettings)
        {
            _globalSettings = globalSettings;
        }

        public Task<bool> IsOriginAllowedAsync(string origin)
        {
            return Task.FromResult(CoreHelpers.IsCorsOriginAllowed(origin, _globalSettings));
        }
    }
}