This Week in Spring - February 14th, 2024

Hi, Spring fans! Welcome to another installment of This Week in Spring! Friends, tomorrow is Valentine's day, and I love Spring. So, it's a very exciting thing indeed to be able to share this week's jam-packed roundup. Let's dive right into it! Spring Tools 4.21.1 is now available In the latest...

This Week in Spring - October 18th, 2022

Hi, Spring fans! Howre you doin? Im doin alright! Last week I was in Antwerp, Belgium, for the amazing Devoxx BE show. I did a presentation with my friend and hero James Ward on Spring and Kotlin that was voted third most-liked talk at a show with more than 250 speakers! That was a personal caree...

Spring Security 5.8.0-M1 and 6.0.0-M6 are released

On behalf of the team and everyone who has contributed, I am pleased to announce that Spring Security 5.8.0-M1 and 6.0.0-M6 are available now. This release includes dependency upgrades, bug fixes, and enhancements. Here are a few noteworthy changes: Deferred SecurityContext lookup...

CVE-2026-41840: Spring Framework Denial of Service via Multipart Requests in WebFlux

Spring WebFlux applications are vulnerable to Denial of Service DoS attacks when processing multipart requests. More precisely, an application can be vulnerable when all the following are true: When all the conditions above are met, an attacker can send malicious multipart requests that can leak...

Towards Spring Tools 5 - Ready for AI

There is no doubt that AI-based coding assistants are already or will be widely used by developers and within organizations. While the overall outlook is pretty certain, the exact way when and how to use those tools might vary, ranging from extensions for existing IDEs e.g. Copilot for Visual...

This Week in Spring - November 12th, 2024

Hi, Spring fans! Welcome to another installment of This Week in Spring! Spring Cloud 2024.0.0-RC1 aka Moorgate has been released In this installment of A Bootiful Podcast , I talk to Gradle developer advocate Baruch Sadogursky good news everybody! GraalVM will now support jcmd, which allows you t...

This Week in Spring - April 2nd, 2024

Welcome, welcome, welcome, to another installment of This Week in Spring! You know, we've come a long way since you and I last spoke. It's April already! A new month! How bizarre. And, with the dawning of a new month, we're also more than 25% through this year! I sure hope you're paying attention...

Hypermedia and Browser Enhancement

Front end development these days is dominated by large JavaScript client side frameworks. There are plenty of good reasons for that, but it can be very inefficient for many use cases, and the framework engineering has become extremely complex. In this article, I want to explore a different...

SSL hot reload in Spring Boot 3.2.0

In Spring Boot 3.2.0, we're adding the ability for embedded web servers to hot-reload SSL certificates and keys. That means you can rotate your SSL trust material without restarting your application. Hot reloading is supported for Tomcat and Netty embedded web servers. Let's see that in action!...

This Week in Spring - July 25th, 2023

Hi, Spring fans! Welcome to another installment of This Week in Spring! Look, I'm going to level with you. This is the view from where I'm staying on holiday right now in tropical Lankawi, Malaysia: I'm super interested in this week's roundup, as always, but I'm also very interested in that...

This Week in Spring - April 25th, 2023

Hi, Spring fans! Welcome to another installment of This Week in Spring! How are you? I'm en route to Bangalore, India, via Frankfurt, for the Developer Summit 2023 edition. It's going to be a ton of fun, and I hope you won't miss it! para Spring Boot 3.1.0-RC1 available now One of the most exciti...

Introducing Microservices Patterns with Spring Integration

Hey Spring Community! I hope you are enjoying Spring One Essentials these days. The most exciting feature for me is an Observability which is spread throughout the Spring portfolio from now on. Nevertheless, today I’d like to share with a project I’m working on since holidays, where the mentioned...

Embracing Virtual Threads

Project Loom has made it into the JDK through JEP 425. Its available since Java 19 in September 2022 as a preview feature. Its goal is to dramatically reduce the effort of writing, maintaining, and observing high-throughput concurrent applications. Where Virtual Threads make sense This makes...

This Week in Spring - May 14th, 2024

Hi, Spring fans! Welcome to another installment of This Week in Spring! This week's highlights in the Spring ecosystem emphasize the ongoing advancements and applications of Spring AI. The discussions range from exploring the impressive VectorStore abstraction and enhanced structured output suppo...

This Week in Spring - August 23rd, 2022

Hi, Spring fans! Welcome to another installment of This Week in Spring! Weve got a ton to cover, so lets dive right into it! A Bootiful Podcast: Flowable founder Joram Barrez on a Bootiful Podcast on workflow, business process management, and more Building IoT Applications Using Fauna and Spring...

Structured logging in Spring Boot 3.4

Logging is a long established part of troubleshooting applications and one of the three pillars of observability, next to metrics and traces. No one likes flying blind in production, and when incidents happen, developers are happy to have log files. Logs are often written out in a human-readable...

Spring AI with NVIDIA LLM API

Spring AI now supports NVIDIA's Large Language Model API, offering integration with a wide range of models. By leveraging NVIDIA's OpenAI-compatible API, Spring AI allows developers to use NVIDIA's LLMs through the familiar Spring AI API. We'll explore how to configure and use the Spring AI OpenA...

A Bootiful Podcast: Spring Cloud cofounder and lead Spencer Gibb on Spring Cloud Gateway for the Servlet API in the era of Project Loom

Hi, Spring fans! In this installment, my first since I returned from two blistering hot but super fun months in Asia, I talk to Spring Cloud cofounder and lead Spencer Gibb @SpencerBGibb about the new Servlet-friendly Spring Cloud Gateway project...

This Week in Spring - June 6th, 2023

Hi, Spring fans! Welcome to another installment of This Week in Spring! And what an insane week it's been! Long story short, I've spent 10-12 hours a day over the last five days migrating a dozen differnet applications and services from one GKE cluster to another, taking the time to update things...

Start from zero and scale to zero – Azure Spring Apps consumption plan

We are launching a new way to pay for Azure Spring Apps -- the consumption pricing plan. This plan is now in public preview so you can start creating and deploying apps today. This new plan is super-efficient because you can start from zero and scale to zero vCPU. You get more straightforward...

Introducing Microservices Patterns with Spring Integration

Hey Spring Community! I hope you are enjoying Spring One Essentials these days. The most exciting feature for me is an Observability which is spread throughout the Spring portfolio from now on. Nevertheless, today I’d like to share with a project I’m working on since holidays, where the mentioned...

This Week in Spring - June 7th, 2022

Hi, Spring fans! Welcome to another installment of This Week in Spring! Ive just landed in tantalizing Toronto, Canada, for the SpringOne Tour Toronto show. Im so excited to be here, at long last, after so long away from one of my favorite countries. Ill be doing two talks - my usual, Kubernetes...

Spring for GraphQL 1.0 Release

On behalf of the Spring for GraphQL team and every contributor, it is my pleasure to announce the 1.0 GA release. Its been 10 months since the project was announced and under 2 years since the first commit, unremarkably called "first commit". The project began with the modest goal to replace the...

This Week in Spring - March 26th, 2024

Hi, Spring fans! Welcome to another installment of This Week in Spring! Sam Brannen shares some good news: a null-safe Index operator for the Spring Expression Language SpEL is coming to Spring Framework 6.2! This is interesting, and a nice application of AI do I even need to spell out "artificia...

Transactional Rollback Strategies with Spring Cloud Stream and Apache Kafka

Other parts in this blog series Part 1: Introduction to Transactions in Spring Cloud Stream Kafka Applications Part 2: Producer Initiated Transactions in Spring Cloud Stream Kafka Applications Part 3: Synchronizing with External Transaction Managers in Spring Cloud Stream Kafka Applications In th...

The 2022 State of Spring Survey Report

Hi, Spring fans! You're awesome! I know you're awesome. You know you're awesome. And the Spring team works for you. We like working for you because you dream awesome dreams and build awesome things. And we can't work effectively with and for you if we don't know where everyone stands. Every year ...

Introducing Microservices Patterns with Spring Integration

Hey Spring Community! I hope you are enjoying Spring One Essentials these days. The most exciting feature for me is an Observability which is spread throughout the Spring portfolio from now on. Nevertheless, today Id like to share with a project Im working on since holidays, where the mentioned...

Spring Boot EndpointRequest.to() creates wrong matcher if actuator endpoint is not exposed

EndpointRequest.to creates a matcher for null/ if the actuator endpoint, for which the EndpointRequest has been created, is disabled or not exposed. Your application may be affected by this if all the following conditions are met: You are not affected if any of the following is true:...

Spring Tips: Spring Boot Testjars

Hi, Spring fans! In this installment we look at the brand new Spring Boot Testjars project, which greatly simplifies standing up and reusing satellite Java-based services like other Spring Boot-based microservices or infrastructure like the Spring Authorization Server. springboot java java21...

Denial of service in static resource handling on Windows platforms

Spring MVC and WebFlux applications are vulnerable to Denial of Service attacks when resolving static resources. More precisely, an application can be vulnerable when all the following are true: When all the conditions above are met, the attacker can send malicious requests that are slow to resol...

Path traversal vulnerability on non-compliant Servlet containers

Spring Framework MVC applications can be vulnerable to a “Path Traversal Vulnerability” when deployed on a non-compliant Servlet container. An application can be vulnerable when all the following are true: We have verified that applications deployed on Apache Tomcat or Eclipse Jetty are not...

This Week in Spring - July 1st, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring! It's July!! This week, I'm on PTO, and as always, I'm looking for good reading material on the plane ride over for my holiday. Thank goodness for the ever-vibrant and awesome Spring community; there's tons of stuff to dive...

Spring Security BCryptPasswordEncoder does not enforce maximum password length

BCryptPasswordEncoder.matchesCharSequence,String will incorrectly return true for passwords larger than 72 characters as long as the first 72 characters are the same...

Spring AI with Groq - a blazingly fast AI inference engine

Faster information processing not only informs - it transforms how we perceive and innovate. Spring AI, a powerful framework for integrating AI capabilities into Spring applications, now offers support for Groq - a blazingly fast AI inference engine with support for Tool/Function calling...

Deploy and Scale Spring Batch in the Cloud – with Adaptive Cost Control

May 21, 2024, at 9 AM PST You can now use Azure Spring Apps to effectively run Spring Batch applications with adaptive cost control. You only pay when batch jobs are running, and you can simply lift and shift your Spring Batch jobs with no code change. Spring Batch is a framework for processing...

This is the Beginning of the End of the N+1 Problem: Introducing Single Query Loading.

TL;DR: Starting with Spring Data JDBC 3.2.0-M2, Spring Data JDBC supports Single Query Loading. Single Query Loading loads arbitrary aggregates with a single select statement. To enable Single Query Loading you need to call setSingleQueryLoadingEnabledtrue on your RelationalMappingContext. In...

Unleash Spring apps in a flex environment with Azure Spring Apps Consumption and Dedicated plans

In March, we introduced the Consumption pricing plan for Azure Spring Apps allowing you to start from zero and scale to zero vCPU. Today, we are thrilled to announce the public preview of the Standard Dedicated plan! The Standard Dedicated plan provides a fully managed, dedicated environment for...

This Week in Spring - June 28th, 2022

Hi, Spring fans! Welcome to another installment of This Week in Spring! Im writing this from the Big Apple, New York City! Im here for the SpringOne Tour 2022 NYC event. This is my first time back in New York City since before the pandemic and it has been so much fun. Ive been catching up with...

Spring Tools 4.15.1 released

Dear Spring Community, I am happy to announce the 4.15.1 release of the Spring Tools 4 for Eclipse, Visual Studio Code, and Theia. fixes and improvements Spring Boot fixed: VScode incorrectly suggests removing @Autowired annotation from methods 787 Spring Boot fixed: VScode quick fix should not...

CVE-2026-41839: Spring Framework Escalation via Session Fixation in WebFlux

A WebFlux application with a compromised subdomain for example, compromised via cross-site scripting XSS is vulnerable to an escalation attack exchanging a known session ID for that of an authenticated user...

CVE-2026-41843: Spring Framework Path Traversal via Versioned Static Resources in Spring MVC and WebFlux

Spring MVC and WebFlux applications are vulnerable to Path Traversal attacks when resolving static resources. More precisely, an application can be vulnerable when all the following are true: When all the conditions above are met, an attacker can send malicious requests that can resolve files...

Spring Framework Denial of Service via AntPathMatcher

Applications may be vulnerable to a Regular Expression Denial of Service ReDoS attack if an attacker is able to provide a pattern which is then directly or indirectly supplied to one of the following methods in AntPathMatcher :...

Beyond JSON: Converting Spring AI Tool Response Formats to TOON, XML, CSV, YAML, ...

JSON is the go-to format for LLM tool responses, but recent discussions around alternative formats like TOON Token-Oriented Object Notation claim potential benefits in token efficiency and performance. While the debate continues—with critical analyses pointing to context-dependent results—the...

This Week in Sprng - March 4th, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring , and Happy Devnexus 2025 to those who celebrate! That's right sports fans, I'm off to awesome Atlanta, Georgia later today for Devnexus, one of the world's largest annual gatherings of Java community and luminaries alike. I'l...

This Week in Spring - June 11th, 2024

This Week in Spring - June 10th, 2024 Hi, Spring fans! Welcome to another installment of This Week in Spring! I'm in Paris, France, to talk to organizations using and working with Spring. Then, next week, it's off to Krakow, Poland, for the amazing Devoxx PL event! I can't wait. If you're around,...

This Year in Spring - 2023

Welcome to another installment of This Week in Spring! It's December 26th, 2023, and we're staring down the new year! And you know what that means, right? It's time for our annual roundup, looking at all the latest and greatest in the wild and wonderful world of Springdom. This is This Year in...

Spring Framework DoS with Multipart Temp Files in WebFlux

A WebFlux server application that processes multipart requests creates temp files for parts larger than 10 K. Under some circumstances, temp files may remain not deleted after the request is fully processed. This allows an attacker to consume available disk space...

Spring AI Agentic Patterns (Part 2): AskUserQuestionTool - Agents That Clarify Before Acting

Traditional AI interactions follow a common pattern: you provide a prompt, the AI makes assumptions, and produces a response. When those assumptions don't match your needs, you're left iterating through corrections. Each assumption creates rework—wasting time and context. What if your AI agent...

Spring Framework DataBinder Case Sensitive Match Exception (2nd update)

CVE-2024-38820 ensured Locale-independent, lowercase conversion for both the configured disallowedFields patterns and for request parameter names. However, there are still cases where it is possible to bypass the disallowedFields checks...

Path traversal vulnerability in functional web frameworks (2nd report)

Applications serving static resources through the functional web frameworks WebMvc.fn or WebFlux.fn are vulnerable to path traversal attacks. An attacker can craft malicious HTTP requests and obtain any file on the file system that is also accessible to the process in which the Spring application...