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...

CVE-2026-41843

CVE-2026-41843...

This Week in Spring - November 19th, 2024

Hi, Spring fans! How are you? Can you believe we're already staring at the end of the month? It's that time of the year when we see new releases, and the new releases reflect that frenzy! Soon: Spring Boot 3.4.0! Are you updated? Make sure you're updated! Remember: Spring projects leave open sour...

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...

Reflectionless Templates With Spring

A few Java libraries have shown up recently that use text templates, but compile to Java classes at build time. They can thus claim to some extent to be "reflection free". Together with potential benefits of runtime performance, they promise to be easy to use and integrate with GraalVM native ima...

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...

This Week in Spring - July 8th, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring! I write this having spent a wonderful week in paradise Bora Bora, French Polynesia, to be precise with my partner Tam Mie. We were so very sad to have to say goodbye. But that means I'm officially back at my desk, with nary a...

This Week in Spring - December 6th, 2022

Hi, Spring fans! Welcome to another installment of This Week in Spring! How are you? You know what Ive wanted to do? See my friends on the Spring team in person since the pandemic descended. And, Im overjoyed to relate, Ive just had the privilege of a nice meeting with several of them last night...

Spring Web Flow 3.0 M1 Released

It has been almost 4 years since the last set of Spring Web Flow releases. Nevertheless, the project continues to serve a specific need particularly well, arguably better than alternatives, and remains in active use. While there hasnt been a strong driver for new releases, the upcoming Spring...

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...

Runtime efficiency with Spring (today and tomorrow)

With Spring Framework 6.1 and Spring Boot 3.2 general availability approaching, we would like to share an overview about several efforts the Spring team is pursuing to allow developers to optimize the runtime efficiency of their applications. We are going to cover the following technologies and u...

This Week in Spring - September 19th, 2023 (Java 21 Edition)

Hi, Spring fans! Welcome to another installment of This Week in Spring - Java 21 edition! The big news, indeed, the biggest news, is that Java 21 is now available here! You should use SDKMAN to install it, like this: sdk install java 21-graalce && sdk default java 21-graalce. This install givews...

Spring Modulith 0.3 released

Hot on the heels of Spring Boot 3.0.2, I am excited to announce the 0.3 release of Spring Modulith. The release is packed with improvements. We have tweaked a couple of things that might require your attention and a couple of adapting changes to your code. The most notable changes are: GH-114 – W...

This Week in Spring - January 26th, 2026

Hi, Spring fans! Welcome to another installment of This Week in Spring! As I write this, I cannot believe we're nearly at the end of the month! Time sure flies. Spring AI 2.0.0-M2 is available now Spring Modulith 2.1 M1, 2.0.2, and 1.4.7 released In last week's installment of A Bootiful Podcast ,...

Tackling the OAuth2 Client component model in Spring Security

In Spring Security 5, we saw many developments in the OAuth2 story with the introduction of OAuth2 Resource Server and OAuth2 Client into the framework. Today, it is quite convenient to develop applications that are secured by OAuth2 using the features available in OAuth2 Resource Server...

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...

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...

This Week in Spring - June 14th, 2022

Hi, Spring fans! Welcome to another installment of This Week in Spring! Ive just arrived in beautiful Berlin, Germany, for the forthcoming We Are Developers show with more than five thousand attendees. I was in Toronto, Canada, for the epic SpringOne Tour installment there. Ive also had the...

This Week in Spring - March 3rd, 2026

Hi Spring fans! Welcome to another rip-roaring installment of This Week in Spring! I'm writing this in an Uber en route to the airport to get to awsome Atlanta, GA, for Devnexus 2026! Who's goin'? You goin'? We - the Spring team - will be there in force! Come say hi at the boothes or come see our...

This Week in Spring - April 8th, 2025

Hi, Spring fans! How are ya? I'm doing fine. Excited, even. You see, Spring AI M7 is coming soon! In theory, it drops on Thursday. Don't hold us to that — these things can change :- But soon , and it's turning out to be a whopper of a release! You should try upgrading your application to the new ...

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...

This Week in Spring - August 29th, 2023 - the post SpringOne recovery blog

Hi, Spring fans! Welcome to another installment of This Week in Spring! I'm exhausted. Seriously. Last week was mental. If you need me, I'll be over sipping on a tea... But, before that, there's a ton of things to cover from this last week, as always, and there's no rest for the curious, so let's...

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 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...

This Week in Spring - April 22nd, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring , which I'm writing from magnificent Minneapolis, Minnesota, where I'm recording an amazing Frontend Masters course introducing Spring Boot. I love this article introducing Spring AI in JavaPro magazine Want to run an LLM...

This Year in Spring – December 30th, 2025

Hi, Spring fans! Can you believe it? It's already the 30th of December! I celebrated Christmas with my family in Los Angeles, then we jumped on a flight headed for Southeast Asia to ring in the New Year with more friends and family. I'm sitting at a café in the sweltering city of Kuala Lumpur,...

Bootiful Spring Boot 3.4: Spring Boot

And now we’re back where we started: Spring Boot 3.4! This release is what pulls everything together. When you look at Spring Boot, remember that it normalizes the integration of all the projects it assembles and tries, wherever possible, to smooth out whatever integration issues might arise from...

This Week in Spring - June 4th, 2024

Hi, Spring fans, from London! I'm in this fabulous country doing my level-headed best to refrain from dooing Mr. Bean bits, because, honestly, if I - an avid and prolific fan of Spring and its many beans - can't be "Mr. Bean," then I'm glad Rowan Atkinson is! I'm here for a SpringOne Tour event,...

This Week in Spring - February 20th, 2024

Hi, Spring fans! Welcome to another installment of This Week in Spring! How are you this fine 20th of February, 2024? I'm doing alright on this rainy 20th of Feburary here in San Francisco, and I hope you are too! We've got a ton of things to get into this week so let's dive right into it! Have y...

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...

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...

Microsoft is committed to the success of Java developers

Hi, Spring fans! This is a guest post from our friend Julia Liuson, President, Developer Division, Microsoft As a company, we are committed to making Java developers as efficient and productive as possible. This commitment means empowering you to use any tool, framework, and application server on...

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...

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-2026-41848

CVE-2026-41848...

cve-2026-59283 - MEDIUM - Spring Framework Safety Guard Bypass via SpEL Expression Compilation

cve-2026-59283 - MEDIUM - Spring Framework Safety Guard Bypass via SpEL Expression Compilation...

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...

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...

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...

This Week in Spring - November 29th, 2022 (Spring Boot 3 has arrived)

Hi, Spring fans! Its here! Its finally here, at long last! Spring Boot 3!! And of course with Spring Boot 3.0 comes a whole portfolio of integrated projects that have also been updated! Remember, a huge theme in this release is support for GraalVM native images, and thats now supported across the...

cve-2026-47838 - MEDIUM - Unauthorized User Impersonation when Using X.509 Client Certificates

cve-2026-47838 - MEDIUM - Unauthorized User Impersonation when Using X.509 Client Certificates...

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...

MongoDB-backed Spring Batch jobs and more in Spring Boot 4.1

Spring Batch was introduced many years before MongoDB existed, and its design assumed the presence of a SQL database in which to store the state of Spring Batch jobs. But that was decades ago, and a common question for anyone new to Spring Batch was, "Why does this thing need to talk to a SQL...

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...

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 - March 19th, 2024

Hi, Spring fans! And happy Java 22 release day to those who celebrate! I just put out a huge blog detailing many of the exciting new features in Java 22. Check it out! As usual, we've got a packed roundup to get through this week so let's dive right into it! the Spring Authorization Server 1.3.0-...

Function Calling in Java and Spring AI using the latest Mistral AI API

UPDATE: As of March 13, 2024, Mistral AI has integrated support for parallel function calling into their large model, a feature that was absent at the time of this blog's initial publication. Mistral AI, a leading developer of open-source large language models, unveiled the addition of Function...

A Use Case for Transactions: Outbox Pattern Strategies in Spring Cloud Stream Kafka Binder

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 Part ...

All together now: Spring Boot 3.2, GraalVM native images, Java 21, and virtual threads with Project Loom,

This has been a very long time in coming, but finally we can create GraalVM native images that use Spring Boot via Spring Boot 3.2 and Java 21's virtual threads Project Loom! Why does all this matter? Each of these individual things, Project Loom, and GraalVM native images, offer compelling runti...