This Week in Spring - August 19th, 2025

Hi, Spring fans! Welcome to another extra special installment of This Week in Spring - special because the next installment will be delivered from the floors of the Ventian where the extraordinairily awesome SpringOne 2025 event will take place! So, some poetry: T’was the Week Before SpringOne...

A Bootiful Podcast: IntelliJ IDEA lead Aleksey Stukalov

Hi, Spring fans! In this installment I talk to IntelliJ IDEA lead Aleksey Stukalov...

A Bootiful Podcast: Java Champion and legend Henri Tremblay

Hi, Spring fans! In this installment I talk to Henri Tremblay, head of TS Imagine Canada, Java Champion, Montreal JUG leader, EasyMock lead dev and all around legend!...

A Bootiful Podcast: HTMX creator Carson Gross

Hi, Spring and HTML fans! Today I talk to hypermedia enjoyer Carson Gross, creator of the ever popular HTMX library which eschews a ton of the complexity associated with building client side applications...

Building Effective Agents with Spring AI (Part 1)

In a recent research publication: Building effective agents, Anthropic shared valuable insights about building effective Large Language Model LLM agents. What makes this research particularly interesting is its emphasis on simplicity and composability over complex frameworks. Let's explore how...

A Bootiful Podcast: Dr. Dave Syer on the new and nifty Spring gRPC project

Hi, Spring fans! In this installment I talk to the good and the great Dr. Dave Syer about the experimental! new Spring gRPC project!...

This Week in Spring - October 8th, 2024

Hi, Spring fans! Welcome to another installment of This Week in Spring! I'm in Antwerp, Belgium, for the amazing Devoxx Belgium 2024 event! I am so happy to be back here, one of the best shows in the Java ecosystem! We've got a lot to get into so let's dive right in! From Spring Cloud Data Flow...

From Spring Cloud Data Flow 2.11.x to 3.0

Dear Spring Community, With the recent announcement of Spring Framework 7.0 and Spring Boot 4.0, the Spring Cloud Data Flow team is pleased to announce the next major release, SCDF 3.0, to align with both Spring Framework 7.0 and Spring Boot 4.0. This will bring the following SCDF ecosystem of...

Path traversal vulnerability in functional web frameworks

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...

A Bootiful Podcast: Digital Accessibility Architect, Java and Groovy legend, Scott Davis

Hi, Spring fans! In this episode I talk to Java ecosystem legend Scott Davis...

A Bootiful Podcast: Cloud Native Cora Iberkleid on architecture, Spring Modulith, and more

Hi, Spring fans! Welcome to another installment of a Bootiful Podcast! In today’s episode, I talk to cloud native Cora Iberkleid about the awesome modular sensation that’s sweeping applications, Spring Modulith!...

PKCE Downgrade in Spring Authorization Server

Spring Authorization Server versions 1.0.0 - 1.0.5, 1.1.0 - 1.1.5, 1.2.0 - 1.2.2 and older unsupported versions are susceptible to a PKCE Downgrade Attack for Confidential Clients. Specifically, an application is vulnerable when a Confidential Client uses PKCE for the Authorization Code Grant. An...

Reactor Netty HTTP Server Metrics DoS Vulnerability

In Reactor Netty HTTP Server, versions 1.1.x prior to 1.1.13 and versions 1.0.x prior to 1.0.39, it is possible for a user to provide specially crafted HTTP requests that may cause a denial-of-service DoS condition. Specifically, an application is vulnerable if Reactor Netty HTTP Server built-in...

Spring Boot server Web Observations DoS Vulnerability

In Spring Boot versions 2.7.0 - 2.7.17, 3.0.0-3.0.12 and 3.1.0-3.1.5, it is possible for a user to provide specially crafted HTTP requests that may cause a denial-of-service DoS condition. Specifically, an application is vulnerable when all of the following are true:...

Exposure of data and identity to wrong session in Spring for GraphQL

A batch loader function in Spring for GraphQL versions 1.1.0 - 1.1.5 and 1.2.0 - 1.2.2 may be exposed to GraphQL context with values, including security context values, from a different session. An application is vulnerable if it provides a DataLoaderOptions instance when registering batch loader...

A Bootiful Podcast: Microsoft’s Sean Li on Azure and Spring Boot

Hi, Spring fans! In this relatively quick installment, recorded live from the lovely Spring I/O 2023, Josh Long talks to Microsoft's Sean Li about some of the latest and greatest in the Azure ecosystem for Spring developers...

This Week in Spring - May 9th, 2023

Hi, Spring fans! Welcome to another wonderful, fancyful installment of This Week in Spring! I was just at the first Devoxx GR, in the sunny mediterranean city of Athens, Greece. Uh, yah, this was a good'un. If you can get to it, you should. Don't miss next year's installment if you missed this on...

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...

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...

Remote Code Execution via YAML editors in STS4 extensions for Eclipse and VSCode

Spring Tools 4 for Eclipse version 4.16.0 and below as well as VSCode extensions such as Spring Boot Tools, Concourse CI Pipeline Editor, Bosh Editor and Cloudfoundry Manifest YML Support version 1.39.0 and below all use Snakeyaml library for YAML editing support. This library allows for some...

Reactor Netty HTTP Server may log request headers

Reactor Netty HTTP Server, in versions 1.0.11 - 1.0.23, may log request headers in some cases of invalid HTTP requests. The logged headers may reveal valid access tokens to those with access to server logs. This may affect only invalid HTTP requests where logging at WARN level is enabled...

This Week in Spring - April 5th, 2022

Hi, Spring fans! Welcome to another installment of This Week in Spring! Im back home from the Hawaiin islands. Its so good to be home. First things first: theres a security vulnerability. Weve already released guidance on how to mitigate as well as new releases of Spring Framework and Spring Boot...

Spring Framework RCE via Data Binding on JDK 9+

A Spring MVC or Spring WebFlux application running on JDK 9+ may be vulnerable to remote code execution RCE via data binding. The specific exploit requires the application to run on Tomcat as a WAR deployment. If the application is deployed as a Spring Boot executable jar, i.e. the default, it is...

Additional Log Injection in Spring Framework (follow-up to CVE-2021-22096)

In Spring Framework versions 5.3.0 - 5.3.13, 5.2.0 - 5.2.18, and older unsupported versions, it is possible for a user to provide malicious input to cause the insertion of additional log entries. This is a follow-up to CVE-2021-22096 that protects against additional types of input and in more...

Spring Cloud Gateway Request Vulnerability

Applications using Spring Cloud Gateway are vulnerable to specifically crafted requests that could make an extra request on downstream services...

Zip-slip mitigation bypass in Spring Integration Zip extension

spring-integration-zip , versions prior to 1.0.4, exposes an arbitrary file write vulnerability, that can be achieved using a specially crafted zip archive affects other archives as well, bzip2, tar, xz, war, cpio, 7z, that holds path traversal filenames. So when the filename gets concatenated to...

Kryo Configuration Allows Code Execution with Unknown “Serialization Gadgets”

Spring Integration framework provides Kryo Codec implementations as an alternative for Java deserialization. When Kryo is configured with default options, all unregistered classes are resolved on demand. This leads to the "deserialization gadgets" exploit when provided data contains malicious cod...

Reactor Netty Consumes a Vulnerable Version of Netty

Reactor Netty, versions 0.8.x prior to 0.8.13 and 0.9.x prior to 0.9.1, depends on vulnerable versions of netty versions prior to 4.1.42, which incorrectly handles whitespace before a colon in headers, leading to HTTP request smuggling attacks...

XML External Entity Injection (XXE)

Spring Web Services, versions 2.4.3, 3.0.4, and older unsupported versions of all three projects, were susceptible to XML External Entity Injection XXE when receiving XML data from untrusted sources...

Unsafe Unzip with spring-integration-zip

spring-integration-zip , versions prior to 1.0.1, exposes an arbitrary file write vulnerability, that can be achieved using a specially crafted zip archive affects other archives as well, bzip2, tar, xz, war, cpio, 7z, that holds path traversal filenames. So when the filename gets concatenated to...

Remote code execution in spring-amqp

In affected versions of Spring AMQP, a org.springframework.amqp.core.Message may be unsafely deserialized when being converted into a string. A malicious payload could be crafted to exploit this and enable a remote code execution attack...

Spring Data JPA Blind SQL Injection Vulnerability

Sort instances handed into user defined Spring Data repository query methods using manually declared JPQL queries are handed to the persistence provider as is and allow attackers to inject arbitrary JPQL into ORDER BY clauses which they might use to draw conclusions about non-exposed fields based...

Spring Social CSRF

When authorizing an application against an OAuth 2 API provider, Spring Social is vulnerable to a Cross-Site Request Forgery CSRF attack. The attack involves a malicious user beginning an OAuth 2 authorization flow using a fake account with an OAuth 2 API provider, but completing it by tricking t...

DoS Attack with XML Input

XML external entities were previously disabled with the publication of http://pivotal.io/security/cve-2013-6429 . If DTD is not entirely disabled, inline DTD declarations can be used to perform Denial of Service attacks known as XML bombs. Such declarations are both well-formed and valid accordin...

Possible XSS when using Spring MVC

The JavaScriptUtils.javaScriptEscape method did not escape all characters that are sensitive within either a JS single quoted string, JS double quoted string, or HTML script data context. In most cases this will result in an unexploitable parse error but in some cases it could result in an XSS...

XML External Entity (XXE) injection in Spring Framework

It was identified that Spring MVC processed user provided XML with JAXB in combination with a StAX XMLInputFactory without disabling external entity resolution. External entity resolution has been disabled in this case. It was subsequently discovered that this fix was incomplete CVE-2013-6429,...

XML eXternal Entity (XXE) injection in Spring Framework

The Spring OXM wrapper did not expose any property for disabling entity resolution when using the JAXB unmarshaller. There are four possible source implementations passed to the unmarshaller: DOMSource, StAXSource, SAXSource and StreamSource. For a DOMSource, the XML has already been parsed by us...

Spring Office Hours Podcast: S5E16 - May Release Train Shift & What's Coming in Spring Boot 4.1

Join Dan Vega and DaShaun Carter for the latest updates from the Spring Ecosystem. In this episode, Dan and DaShaun break down the recently announced shift of the May release train from May 11-22 to June 1-5, and what that means for your upgrade planning across the Spring portfolio. They also dig...

Spring AI Agentic Patterns (Part 6): AutoMemoryTools — Persistent Agent Memory Across Sessions

File-Based Long-Term Memory for Spring AI Agents Agents are only as useful as what they remember. Spring AI's Chat Memory stores the full conversation and can persist it across restarts, but when the window fills, the oldest messages are evicted. The upcoming Session API will add recursive...

A Bootiful Podcast: Cay Horstmaan, legendary Java professor, author, lecturer

Hi, Spring fans! In this installment, we talk to the legendary Java author, professor, and Java Champion Cay Horstmann, whom you might know from classics such as "Core Java." his web site And of course even the most cursory search will land you at his books... javaone java...

This Week in Spring - March 17th, 2026

Hi, Spring fans! Welcome to another rip-roaring installment of This Week in Spring , which I'm posting ahead of my keynote at the amazing JavaOne 2026 event here in sunny San Francisco, California! I love Piotr's latest post on using local AI models with LM Studio and Spring AI Did you see the ne...

This Week in Spring - November 18th, 2025

This Week in Spring - November 18th, 2025 Hi, Spring fans! I'm thrilled to be in New York City for an exciting week of joint presentations on Spring AI + Bedrock and Spring Boot with the legendary James Ward. First up: we'll present a workshop at the AI Native Dev Conf today, then speak at the...

This Week in Spring - November 10th, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring! As I write this I am preparing for a flight to North Carolina first in flight!. This week's going to be busy, but next week even busier still! I'll be at AI By The Bay in San Francisco, AI Native Dev Con in NYC, and QCon SF i...

This Week in Spring - October 14th, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring! I'm in Boston and New York city and Bulgaria and Poland this week, but I'm still hyped about last week's amazing Devoxx Belgium event! There are a ton of videos to look at, and I'll include just some of them here. So, without...

Spring Authorization Server moving to Spring Security 7.0

Spring Authorization Server has come a long way since 1.0 was officially released in November 2022. Starting as a project separate from Spring Security, has allowed it to iterate quickly on feature development and ultimately grow a rich feature set for building OAuth2 Authorization Servers. It ha...

A Bootiful Podcast: JobRunr founder Ronald Dehuysser on what's new in version 8

Hi, Spring fans! In this installment, fresh after an exciting and exhausting SpringOne 2025, I am thrilled to have talked with JobRunr founder Ronald Dehuysser on what's new in version 8.0.0. Learn more about JobRunr v8 here!...

A Bootiful Podcast: Andrey Belyaev, product manager for IntelliJ IDEA

Hi, Spring fans! In this installment, we talk to Andrey Belyaev, a Product Manager at JetBrains working on the IntelliJ IDEA product, about the latest-and-greatest support for Spring in Jetbrains IntelliJ IDEA!...

A Bootiful Podcast: Architecture sage and Spring Modulith lead Oliver Drotbohm

Hi, Spring fans! In this installment I caught up with architecture guru and Spring Modulith founder and lead Oliver Drotbohm and we looked at some of the amazing possibilities in Spring Modulith 2.0, coming after Spring Framework 7.0 and Spring Boot 4.0 drop later this year!...

A Bootiful Podcast: Andrew Lombardi, Beginning Spring AI co-author, and friend of the show

Hi, Spring fans! In this installment I am thrilled to talk to my longtime friend Andrew Lombardi about the latest-and-greatest, his new book Beginning Spring AI , and more...

A Bootiful Podcast: Spring legends Tasha Isenberg and Jason Konicki

Hi, Spring fans! In this edition, I had the pleasure of chatting with the brilliant Arjen Poutsma, our go-to API oracle. If you’re curious about his fantastic insights, thoughts, and consultancy services, be sure to check out poutsma-principles.com...