diff --git a/recommend/registry/registry.go b/recommend/registry/registry.go
index 61046498..933d7920 100644
--- a/recommend/registry/registry.go
+++ b/recommend/registry/registry.go
@@ -78,6 +78,9 @@ func (r *Scanner) loadDockerAuthConfigs() {
 		}
 
 		for _, conf := range confsWrapper.Auths {
+			if len(conf.Auth) == 0 {
+				continue
+			}
 			data, _ := base64.StdEncoding.DecodeString(conf.Auth)
 			userPass := strings.SplitN(string(data), ":", 2)
 			r.authConfiguration.authCreds = append(r.authConfiguration.authCreds, getAuthStr(userPass[0], userPass[1]))