How to configure Spring Security to allow Swagger URL to be accessed without authentication

Adding this to your WebSecurityConfiguration class should do the trick.

@Configuration
public class WebSecurityConfiguration extends WebSecurityConfigurerAdapter {

    @Override
    public void configure(WebSecurity web) throws Exception {
        web.ignoring().antMatchers("/v2/api-docs",
                                   "/configuration/ui",
                                   "/swagger-resources/**",
                                   "/configuration/security",
                                   "/swagger-ui.html",
                                   "/webjars/**");
    }

}

I had the same problem using Spring Boot 2.0.0.M7 + Spring Security + Springfox 2.8.0. And I solved the problem using the following security configuration that allows public access to Swagger UI resources.

@Configuration
@EnableWebSecurity
@EnableGlobalMethodSecurity(prePostEnabled = true, securedEnabled = true)
public class SecurityConfiguration extends WebSecurityConfigurerAdapter {

    private static final String[] AUTH_WHITELIST = {
            // -- Swagger UI v2
            "/v2/api-docs",
            "/swagger-resources",
            "/swagger-resources/**",
            "/configuration/ui",
            "/configuration/security",
            "/swagger-ui.html",
            "/webjars/**",
            // -- Swagger UI v3 (OpenAPI)
            "/v3/api-docs/**",
            "/swagger-ui/**"
            // other public endpoints of your API may be appended to this array
    };


    @Override
    protected void configure(HttpSecurity http) throws Exception {
        http.
                // ... here goes your custom security configuration
                authorizeRequests().
                antMatchers(AUTH_WHITELIST).permitAll().  // whitelist Swagger UI resources
                // ... here goes your custom security configuration
                antMatchers("/**").authenticated();  // require authentication for any endpoint that's not whitelisted
    }

}

I updated with /configuration/** and /swagger-resources/** and it worked for me.

@Override
public void configure(WebSecurity web) throws Exception {
    web.ignoring().antMatchers("/v2/api-docs", "/configuration/ui", "/swagger-resources/**", "/configuration/**", "/swagger-ui.html", "/webjars/**");

}