Securing actuator endpoints in Spring Boot - Performance & Optimization

Performance: Securing actuator endpoints

MEDIUM IMPACT

This affects the initial page load speed and interaction responsiveness by controlling access to sensitive management endpoints.

Protecting sensitive actuator endpoints in a Spring Boot application

Spring Boot

management.endpoints.web.exposure.include=health,info
spring.security.user.name=admin
spring.security.user.password=strongpassword
# Secure actuator endpoints with basic authentication and limit exposure

Limits exposed endpoints and requires authentication, reducing unauthorized access and protecting server resources.

📈 Performance GainPrevents unnecessary load from unauthorized requests, maintaining stable response times and interaction performance

Protecting sensitive actuator endpoints in a Spring Boot application

Spring Boot

management.endpoints.web.exposure.include=*
# No authentication or authorization configured for actuator endpoints

Exposes all actuator endpoints publicly, risking security and potential abuse which can lead to performance degradation under attack.

📉 Performance CostIncreased risk of high load from unauthorized requests causing slower response times and potential denial of service

Performance Comparison

Pattern	DOM Operations	Reflows	Paint Cost	Verdict
Unsecured actuator endpoints	N/A	N/A	N/A	[X] Bad
Secured and limited actuator endpoints	N/A	N/A	N/A	[OK] Good

Rendering Pipeline

Securing actuator endpoints affects the server response phase before any content reaches the browser. It controls whether the request is processed or rejected early, impacting interaction responsiveness.

→Server Request Handling

→Response Generation

⚠️ BottleneckServer Request Handling when unauthorized requests flood endpoints

Core Web Vital Affected

INP

This affects the initial page load speed and interaction responsiveness by controlling access to sensitive management endpoints.

Optimization Tips

1Always require authentication for sensitive actuator endpoints.

2Limit actuator endpoint exposure to only what is necessary.

3Monitor actuator endpoint access to detect and prevent abuse.

Performance Quiz - 3 Questions

What is the main performance risk of leaving actuator endpoints unsecured?

A CSS styles will not load properly

B Unauthorized requests can overload the server causing slow response times

C The browser will block rendering of the page

D JavaScript execution will be delayed

DevTools: Network

How to check: Open DevTools, go to Network tab, request actuator endpoints, and check response status codes and timing.

What to look for: Look for 401 or 403 status codes indicating secured endpoints and fast response times without delays from unauthorized access.