Interesting new filters on Spring Cloud Gateway 4.0

Spring Cloud Gateway 4.0 is finally here! Thanks to our community contributions we have introduced new features and interesting filters. This blog post details new noteworthy and explains some of the new filters included, how they work and how you can use it to provide more insights into your...

CVE report published for Spring Cloud Function

We have released Spring Cloud Function 3.2.6 to address the following CVE report. CVE-2202-22979: Spring Cloud Function Dos Vulnerability Please review the information in the CVE report and upgrade immediately...

Ever wanted to rewrite a query in Spring Data JPA?

Sometimes, no matter how many features you try to apply, it seems impossible to get Spring Data JPA to apply every thing youd like to a query before it is sent to the EntityManager. With 3.0.0-SNAPSHOT and targeted for the next milestone release train of Spring Data, you now have the ability to g...

This Week in Spring - September 1st, 2026

Hi, Spring fans! Welcome to another exciting installment of This Week in Spring! I'm writing this from lovely Oslo, Norway, for the joyous JavaZone conference. Next, I'm going to Amsterdam for the interesting IntelliJ IDEA conference, and then finally it's off to Kansas City for the kinetic KCDC...

Moving beyond Strings in Spring Data

If you've worked with data access in Java and especially with Spring Data for a while, then you are familiar with various Query and Update programming models. You write data access code. You refactor a property name. You run your tests. They fail. Your query strings? Still pointing to the old...

Securing Spring AI MCP servers with OAuth2

Spring AI offers support for Model Context Protocol, or MCP for short, which allows AI models to interact with and access external tools and resources in a structured way. With Spring AI, developers can create their own MCP Servers and expose capabilities to AI models in just a few lines of code...

Spring Framework DataBinder Case Sensitive Match Exception

The fix for CVE-2022-22968 made disallowedFields patterns in DataBinder case insensitive. However, String.toLowerCase has some Locale dependent exceptions that could potentially result in fields not protected as expected...

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...

Spring AI with Ollama Tool Support

Earlier this week, Ollama introduced an exciting new feature: tool support for Large Language Models LLMs. Today, we're thrilled to announce that Spring AI 1.0.0-SNAPSHOT has fully embraced this powerful feature, bringing Ollama's function calling capabilities to the Spring ecosystem. Ollama's to...

This Week in Spring - December 5th, 2023

Hi, Spring fans! Welcome to another installment of This Week in Spring! today, Spring Cloud, based on Spring Boot 3.2, goes GA! Don't miss this! I love this blog by Spring Framework legend Sébastien Deleuze on CDS with Spring Framework 6.1 I really enjoyed this discussion with Spring Security...

Azure Spring Apps Enterprise – More Power, Scalability & Extended Spring Boot Support

Can you believe Spring is celebrating its 20th anniversary this year? We could not have gotten here without our millions of Spring developers across the globe, thank you! Spring has been an essential tool for Java developers, and it continues to grow and innovate at a fast pace. From the onset,...

A Bootiful Podcast: José Paumard, Java Champion alumnus and Java legend, on Project Loom, Valhalla, and more, from Devnexus 2023!

Hi, Spring fans! Welcome to another installment of A Bootiful Podcast. In this installment I'll talk to legendary Oracle Java Champion alumnus, Java advocate, professor emeritus, and all around amiable fellow José Paumard, recorded at the amazing Devnexus 2023 event! José's English-language Youtu...

Spring Tips: Vaadin Flow and Spring Boot 3

Hi, Spring fans! In this installment, we'll look at the fantastic Vaadin Flow library, which has recently been updated for Spring Boot 3, and how it can help you be happier. the code is available, as usual, here this episode features special guest Marcus Hellberg, VP developer relations from...

This Week in Spring - February 7th, 2023

Hi, Spring fans! Welcome to another installment of This Week in Spring! It's Tuesday, February 7th, 2023, as I write this and I'm so very glad to be talking to you. How're you doin'? Some housekeeping: I'll be doing more live streams over on my YT channel - join me and we'll talk shop. I'm going...

Spring Boot 3.0.1 available now

On behalf of the team and everyone who has contributed, Im happy to announce that Spring Boot 3.0.1 has been released and is now available from Maven Central. This release includes 54 bug fixes, documentation improvements, and dependency upgrades. Thanks to all those who have contributed with iss...

This Week in Spring - December 20th, 2022

Hi, Spring fans! Its the 20th of December, 2022 as I write this, which means that by the time we meet again, here on this humble blog, Tuesday next week, Christmas will already have come and gone. Chanukah is already here! Time is sure flying! So, to those of you who celebrate: Happy Chanukah,...

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...

This Week in Spring - May 24th, 2022

Hi, Spring fans! Im in Spain for business and not just a little pleasure. Yesterday, my partner, her mother, and I went to Formentera, Spain, a little island off of Ibiza, Spain. It was amazing. Were now in Ibiza, Spain, which is a little island not far from Barcelona, Spain, on the mainland of...

A Bootiful Podcast: GraphQL Java founder Andi Marek

Hi, Spring fans! In this installment of a Bootiful Podcast, Josh Long @starbuxman talks to the GraphQL Java project founder and lead, Atlassian engineer, and Spring GraphQL cofounder Andi Marek @andimarek...

CVE-2026-41842: Spring Framework Denial of Service via Versioned Resources in Spring MVC and WebFlux

Spring MVC and WebFlux applications are vulnerable to Denial of Service DoS 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 are slow to...

PID file write follows symlinks at predictable default path

When an application is configured to use ApplicationPidFileWriter , a local attacker with write access to the PID file's location can corrupt one file on the host each time the application is started...

User Attribute Enumeration when Using DaoAuthenticationProvider

If an application is using the UserDetailsisEnabled , isAccountNonExpired , or isAccountNonLocked user attributes, to enable, expire, or lock users, then DaoAuthenticationProvider 's timing attack defense can be bypassed for users who are disabled, expired, or locked...

This Week in Spring - March 24th, 2026

Hi, Spring fans! Welcome to yet another rip-roarin' installment of This Week in Spring. As usual, we've got a ton to look into, so let's dive right in! Happy 22nd birthday to Spring Framework, released this day 22 years ago! and of course, next week, 1 April 2026, marks 12 years since Spring Boot...

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...

Dynamic Tool Updates in Spring AI's Model Context Protocol

The Model Context Protocol MCP is a powerful feature in Spring AI that enables AI models to access external tools and resources through a standardized interface. One interesting capabilities of MCP is its ability to dynamically update available tools at runtime. This blog post explores how Spring...

This Week in Spring - May 27th, 2024

Hi, Spring fans! Welcome to another installment of This Week in Spring! And what a week it will be! I'm in Venice, Italy, on a little vacation, but tomorrow I begin a quick journey to beautiful Sofia, Bulgaria, where I'll be speaking at the amazing JPrime software show it's my first time speaking...

Spring Office Hours Podcast: S5E17 - Spring Boot 4.1 with Phil Webb

Join Dan Vega and DaShaun Carter for the latest updates from the Spring Ecosystem. In this episode, Dan and DaShaun are joined by Spring Boot co-creator and project lead Phil Webb to dig into what's new in Spring Boot 4.1. They walk through the headline features landing in this release, including...

Tool Calling in Spring AI 2.0: A Composable, Agentic Architecture

Tool calling — the ability for an AI model to invoke application-defined functions and act on the results — is the essential building block of agentic AI systems. A model that can discover information, take action, and loop until a goal is reached is an agent. Spring AI 2.0 rearchitects tool...

Potential Security Misconfiguration when Using withIssuerLocation

When an application configures JWT decoding with NimbusJwtDecoder or NimbusReactiveJwtDecoder , it must configure an OAuth2TokenValidator separately, for example by calling setJwtValidator . This is easy to miss when using NimbusJwtDecoderwithIssuerLocation or...

This Week in Spring - December 2nd, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring. By mistake, I inadvertently published older content in this installment, then tried to fix it and ended up re-publishing the same content. And, what's worse, I somehow ended up deleting the draft I had written for this...

Spring gRPC Next Steps for 1.0.0

This is a new blog post in the Road to GA series, this time updating everyone on the plans to integrate Spring gRPC with Spring Boot 4. The original plan was to move the autoconfiguration from Spring gRPC into Spring Boot in time for the 4.0 release. Unfortunately we haven't been able to find the...

RFD Attack via “Content-Disposition” Header Sourced from Request

In Spring Framework, versions 6.0.x as of 6.0.5, versions 6.1.x and 6.2.x, an application is vulnerable to a reflected file download RFD attack when it sets a “Content-Disposition” header with a non-ASCII charset, where the filename attribute is derived from user-supplied input. Specifically, an...

This Week in Spring - January 30th, 2024

Hi, Spring fans! It's January 30th, and it's a very special week for me as, tomorrow, I celebrate my birthday and the birthday of my biological father with whom I share the same birthday! Happy birthday, dad! Sadly, he passed in 2019. I'm pretty excited! I'm turning 40. Feels good. Almost as good...

Introduction to Transactions in Spring Cloud Stream Kafka Applications

We are starting a new blog series that focuses on working with transactions in Spring Cloud Stream Kafka applications. This blog series covers many low-level details of writing transactional applications with Spring Cloud Stream and Apache Kafka. By the end of this blog series, we hope to give yo...

This Week in Spring - April 18th, 2023

Hi, Spring fans! Welcome to another installment of This Week in Spring! This week, I just returned from Western Europe for Devoxx FR Paris and Kotlin Conf Amsterdam. I went home, saw my family, did some laundry, and then turned right back around to head to Chicago, Illinois, for a special joint...

Empty SecurityContext Is Not Properly Saved Upon Logout

In Spring Security, versions 5.7.x prior to 5.7.8, versions 5.8.x prior to 5.8.3, and versions 6.0.x prior to 6.0.3, the logout support does not properly clean the security context if using serialized versions. Additionally, it is not possible to explicitly save an empty security context to the...

Do more with Azure Spring Apps – scale to zero and enhance productivity

In 2020, Spotify coined the term "Golden Path” to refer to a supported approach and set of components to build and deploy software. Having these paths simplifies the development process, lets developers focus on their applications instead of infrastructure and speeds time to production. Microsoft...

Spring at JavaOne 2022

Hi, Spring fans! Its Sunday the 16th of October as I write this and Im winging my way to sunny Las Vegas, Nevada, where Ill be attending and presenting at the first JavaOne show in years! It didnt exist as the JavaOne we know and love for years, even before the pandemic interrupted life as we kno...

Spring Office Hours Podcast: S5E19 - Docker, Compose, Testcontainers, Oh My!

Join Dan Vega and DaShaun Carter for the latest updates from the Spring Ecosystem. In this episode, Dan and DaShaun will discuss some of the new features around Docker, Testcontainers and the Spring Boot plugin. You can participate in our live stream to ask questions or catch the replay on your...

A Bootiful Podcast: Microsoft's Martijn Verburg

Hi Spring fans! In this installment, I talk to my friend from JClarity and Microsoft fame, fellow Java champion, and Java guru Martijn Verburg ai microsoft java jclarity performance...

Cassandra SSL auto-configuration disables TLS hostname verification

Spring Boot's Cassandra auto-configuration does not perform hostname verification when establishing an SSL connection to Cassandra...

This Week in Spring - February 17th, 2026

Hi, Spring fans! Welcome to another rip-roaring installment of This Week in Spring! It's Lunar New Year or Chinese New Year for billions of people around the world and to those who celebrate, Happy Chinese/Lunar New Year 新年快乐! Or Happy Spring Festival 春节快乐! My favorite kind of festival! In honor ...

This Week in Spring - January 27th, 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 ,...

Spring AI Agentic Patterns (Part 3): Why Your AI Agent Forgets Tasks (And How to Fix It)

Have you ever asked an AI agent to perform a complex multi-step task, only to find it skipped a critical step halfway through? You're not alone. Research shows that LLMs struggle with "lost in the middle" failures—forgetting tasks buried in long contexts. When your agent juggles file edits, test...

Spring gRPC 0.4.0 for great good!

NB : you can find the working code for this blog here There's a new release of the amazing—if experimental—Spring gRPC project: version 0.4.0. I won't get into the nitty-gritty of all that's new, but I just wanted to highlight how elated I am to use it and walk you through the step-by-step path t...

A Bootiful Podcast: Spring Security lead Rob Winch on the amazing Spring Security 6.4 release

Hi, Spring fans! In this installment, we'll talk to the amazing Rob Winch, lead of Spring Security 6.4, about the jam-packed new release! spring springboot security java...

This Week in Spring - November 26th, 2024

This Week in Spring - November 26th, 2024 Hi, Spring fans! Welcome to another installment of This Week in Spring! Happy Spring Boot 3.4 release month to those who celebrate! And, also, Happy Thanksgiving to those who celebrate! Spring Boot 3.4 brings with it long-anticipated updates to the entire...

Spring AI - Structured Output

UPDATE: 04.06.2024 Adde snippets for using structured output with the new, fluent ChatClient API . UPDATE: 17.05.2024 Generic Types support for BeanOutputConverter added. Science works with chunks and bits and pieces of things with the continuity presumed, and Art works only with the continuities...

Producer Initiated Transactions in Spring Cloud Stream Kafka Applications

Other parts in this blog series Part 1: Introduction to Transactions in Spring Cloud Stream Kafka Applications This article is part 2 of the blog series in which we look at transactions in detail with Spring Cloud Stream and Apache Kafka. We saw a general introduction to transactions in the...

This Week in Spring - SpringOne Essentials 2023 edition - January 24th, 2023

Hi, Spring fans! Welcome to another installment of This Week in Spring! Today is a very day for you see, today we kick off SpringOne Essentials, the online incarnation of SpringOne, online. Well see you live, on stream, in just a few hours!. SpringOne Essentials is going to be amazing, but before...