[Snyk] Security upgrade org.springframework.boot:spring-boot-starter-web from 2.7.3 to 4.0.0

[malhanpraveen]

Snyk has created this PR to fix 2 vulnerabilities in the maven dependencies of this project.

Snyk changed the following file(s):

• examples/pom.xml

Vulnerabilities that will be fixed with an upgrade:

	Issue	Score	Upgrade
	Arbitrary Code Injection SNYK-JAVA-ORGSPRINGFRAMEWORK-19267098	741	org.springframework.boot:spring-boot-starter-web: 2.7.3 -> 4.0.0 Major version upgrade No Known Exploit
	Allocation of Resources Without Limits or Throttling SNYK-JAVA-ORGSPRINGFRAMEWORK-19267075	701	org.springframework.boot:spring-boot-starter-web: 2.7.3 -> 4.0.0 Major version upgrade No Known Exploit

Breaking Change Risk

Notice: This assessment is enhanced by AI.

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Learn how to fix vulnerabilities with free interactive lessons:

🦉 Arbitrary Code Injection
🦉 Allocation of Resources Without Limits or Throttling

[malhanpraveen]

This is a double major version upgrade from 2.7.3 to 4.0.0, which includes two sets of significant and mandatory breaking changes. This upgrade requires a multi-step migration and substantial developer effort.

Migration from Spring Boot 2.7.x to 3.0.x

The first major jump requires moving to Spring Boot 3.0, which introduces several foundational breaking changes:

• Java 17 Baseline: Spring Boot 3.0 requires Java 17 as a minimum version. Applications must be upgraded from Java 8 or 11.
• Jakarta EE Migration: This is the largest breaking change. Spring Boot 3.0 migrates from Java EE to Jakarta EE. All javax.* package imports must be replaced with jakarta.* across the entire application. This affects persistence, validation, and servlet APIs.
• Dependency Upgrades: The upgrade includes new major versions of core dependencies like Spring Framework 6 and Spring Security 6, which have their own breaking changes.
• Configuration Properties: Numerous configuration properties have been renamed or removed. It is recommended to use the spring-boot-properties-migrator module to help identify and manage these changes.

Migration from Spring Boot 3.x to 4.0.x

After stabilizing on version 3, the upgrade to 4.0 introduces another layer of breaking changes:

• Platform Upgrade: Spring Boot 4.0 is built on Spring Framework 7 and Jakarta EE 11, requiring a Servlet 6.1 baseline.
• Codebase Modularization: Spring Boot starters are now smaller and more focused. You may need to add new, more specific starter dependencies to your build, as the transitive dependencies you previously relied on may no longer be included.
• Undertow Support Dropped: Support for Undertow as an embedded server has been removed due to incompatibility with the Servlet 6.1 baseline.
• Jackson 3.x: Support for Jackson 2.x is removed in favor of Jackson 3.x, which may impact JSON serialization.

Recommendation: This upgrade cannot be performed in a single step. The official guidance is to first migrate the application from 2.7.3 to the latest Spring Boot 3.x release. After fully testing and stabilizing the application on version 3, you can then plan the subsequent migration to 4.0.0. This is a major refactoring effort that requires careful planning and extensive testing.

Source: Spring Boot 3.0 Migration Guide, Spring Boot 4.0 Migration Guide

Notice 🤖: This content was augmented using artificial intelligence. AI-generated content may contain errors and should be reviewed for accuracy before use.