Spring Session Hazelcast: Now Led by Hazelcast Team

It gives me great pleasure to announce that the Spring Session Hazelcast project will now be led by the Hazelcast Team. NOTE: This announcement is in alignment with our announcement Spring Session MongoDB: Now Led by MongoDB Team. For ten years Spring Session has provided the infrastructure for...

Securing MCP Servers with Spring AI

Model Context Protocol, or MCP for short, has taken over the AI world. If you've been following our blog, you've probably read the introduction to the topic, Connect Your AI to Everything: Spring AI's MCP Boot Starters. The security aspects of MCP have been evolving fast, and the latest version o...

API Versioning in Spring

In this 2nd blog post of the Road to GA series highlighting major features within the Spring portfolio for the next major versions to be released in November, I’m going to focus on the upcoming API Versioning support in Spring Framework 7. Introduction API versioning is a challenging topic. Most...

Core Spring Resilience Features: @ConcurrencyLimit, @Retryable, and RetryTemplate

This is the first blog post in the Road to GA series, highlighting major features within the Spring portfolio for the next major versions to be released in November of this year. Today we are proud to announce the new resilience features coming in Spring Framework 7.0: concurrency throttling and...

This Week in Spring - August 5th, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring! It's August 5th! Which means we're only 20 days away until SpringOne 2025! Have you registered? There's so much to cover this week, so let's dive right into it! Spring Shell 3.4.1 is out! - the new release includes a number o...

A Bootiful Podcast: Dr. Heinz Kabutz, a legendary Java Champion, teacher, and author of the Java Specialists newsletter!

Hi, Spring fans! In this installment, I talk to Dr. Heinz Kabutz, a legendary Java Champion, trainer, teacher, and author of the Java Specialists newsletter! This episode was recorded live at Devoxx UK 2025...

Repository Vector Search Methods

The emergence of Large Language Models LLM has propelled Generative AI and surfaced one of its key components to a broad audience: Embeddings. Embeddings are a vector representation of data in a high-dimensional space capturing their semantic meaning. Vector representations allow for more efficie...

A Bootiful Podcast: Wiremock's leaders Lee Turner and Tom Akehurst

Hi, Spring fans! In this installment we talk to Wiremock's leaders Lee Turner and Tom Akehurst...

This Week in Spring - March 25th, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring! This week, I’m in Portland, OR, then I'm off to Austin, TX for the Arc of AI show, and then I'm off to Amsterdam for Voxxed Days Amsterdam! If you're around, be sure to say hi! There's a ton of cool stuff to look at, so witho...

A Bootiful Podcast: Java Developer Advocate Billy Korando on JavaOne 2025, Java 24, and so much more

Hi, Spring fans! in this installment I talk to Java developer advocate Billy Korando about the latest and greatest in the amazing Java ecosystem! java JavaOne Oracle...

A Bootiful Podcast: Intact's Luke Shannon

Hi, Spring fans! and happy holidays! in this installment I talk to Intact's Luke Shannon about their use of Spring, developer portals, and so much more...

A Bootiful Podcast: GraalVM founder and BDFL Thomas Wuerthinger on GraalPy, GraalVM, and so much more

Hi, Spring fans! In this installment I talk to GraalVM founder and benevolent dictator for life Thomas Wuerthinger, recorded live from Devoxx Belgium 2024!...

From Spring Framework 6.2 to 7.0

Dear Spring community, Spring Framework 6.2 is shaping up for general availability in November 2024, with particularly significant revisions in the core container and in our web support: see "What's New in Spring Framework 6.2". This release is designed for use with JDK 17-23 and Jakarta EE 9-10...

A Bootiful Podcast: JobRunr creator Ronald Dehuysser

Hi, Spring fans! Happy 4th of July, if you celeberate! In this installment of A Bootiful Podcast, I talk to JobRunr.io creator Ronald Dehuysser, recorded live from the amazing Spring IO 2024 show in beautiful Barcelona, Spain!...

This Week in Spring - October 24th, 2023

Hi, Spring fans! This week I'm in Lisbon, and Porto, Portugal, ahead of the Porto Tech Hub event in Porto, and my tour bus is about to leave! So, let's dive right into it! Spring Authorization Server 1.1.3, 1.0.4 and 0.4.4 available now Spring Authorization Server 1.2.0-RC1 available now Spring...

Security Bypass With Wildcard Pattern Matching on Cloud Foundry

In Spring Boot versions 3.0.0 - 3.0.5, 2.7.0 - 2.7.10, 2.6.0 - 2.6.14, 2.5.0 - 2.5.14 and older unsupported versions, an application that is deployed to Cloud Foundry could be susceptible to a security bypass. Specifically, an application is vulnerable when all of the following are true: NOTE:...

Authorization rules can be bypassed via forward or include dispatcher types in Spring Security

Spring Security, versions 5.7 prior to 5.7.5 and 5.6 prior to 5.6.9 could be susceptible to authorization rules bypass via forward or include dispatcher types. Specifically, an application is vulnerable when all of the following are true: An application is not vulnerable if any of the following i...

Remote code execution in Spring Cloud Function by malicious Spring Expression

In Spring Cloud Function versions 3.1.6, 3.2.2 and older unsupported versions, when using routing functionality it is possible for a user to provide a specially crafted SpEL as a routing-expression that may result in remote code execution and access to local resources...

Spring-AMQP Remote Denial of Service - Out of Memory Error with a Large Message Body

The Spring AMQP Message object, in its toString method, will create a new String object from the message body, regardless of its size. This can cause an OOM Error with a large message body...

Spring Cloud Netflix Hystrix Dashboard template resolution vulnerability

Applications using both spring-cloud-netflix-hystrix-dashboard and spring-boot-starter-thymeleaf expose a way to execute code submitted within the request URI path during the resolution of view templates. When a request is made at /hystrix/monitor;user-provided data , the path elements following...

Dictionary attack with Spring Security queryable text encryptor

Spring Security versions 5.3.x prior to 5.3.2, 5.2.x prior to 5.2.4, 5.1.x prior to 5.1.10, 5.0.x prior to 5.0.16 and 4.2.x prior to 4.2.16 use a fixed null initialization vector with CBC Mode in the implementation of the queryable text encryptor. A malicious user with access to the data that has...

Signature Wrapping Vulnerability with spring-security-saml2-service-provider

Spring Security versions 5.2.x prior to 5.2.4 and 5.3.x prior to 5.3.2 contain a signature wrapping vulnerability during SAML response validation. When using the spring-security-saml2-service-provider component, a malicious user can carefully modify an otherwise valid SAML response and append an...

Directory Traversal with spring-cloud-config-server

Spring Cloud Config, versions 2.2.x prior to 2.2.2, versions 2.1.x prior to 2.1.7, and older unsupported versions allow applications to serve arbitrary configuration files through the spring-cloud-config-server module. A malicious user, or attacker, can send a request using a specially crafted UR...

Reactor Netty authentication leak in redirects

Pivotal Reactor Netty, versions prior to 0.8.11, passes headers through redirects, including authorization ones. A remote unauthenticated malicious user may gain access to credentials for a different server than they have access to...

XML External Entity Injection (XXE)

Spring Batch versions 3.0.9, 4.0.1, 4.1.0, and older unsupported versions, were susceptible to XML External Entity Injection XXE when receiving XML data from untrusted sources...

DoS Attack via Range Requests

Spring Framework, version 5.1, versions 5.0.x prior to 5.0.10, versions 4.3.x prior to 4.3.20, and older unsupported versions on the 4.2.x branch provide support for range requests when serving static resources through the ResourceHttpRequestHandler , or starting in 5.0 when an annotated controll...

cve-2026-59327 - MEDIUM - CVE-2026-59327: Cleartext Storage of Spring Boot DevTools Remote Secret in Eclipse Launch Configurations

Spring Tools for Eclipse stores the Spring Boot DevTools remote secret spring.devtools.remote.secret as a plain string attribute on the "Spring Boot DevTools Client" launch configuration. Eclipse persists launch configuration attributes as cleartext XML, either to workspace metadata or, if the us...

cve-2026-40983 - HIGH - Micrometer gRPC server instrumentation DoS vulnerability

cve-2026-40983 - HIGH - Micrometer gRPC server instrumentation DoS vulnerability...

cve-2026-41007 - HIGH - Spring HATEOAS heap exhaustion through unbounded internal caching

cve-2026-41007 - HIGH - Spring HATEOAS heap exhaustion through unbounded internal caching...

Modularizing Spring Boot

Continuing our Road to GA series, this week we're exploring the modularization effort happening with Spring Boot 4. When Spring Boot 1.0 was released in 2014, it shipped with a single spring-boot-autoconfigure jar weighing in at 182 KiB. Of course, that initial version didn't support a great deal...

A Bootiful Podcast: Spring Security contributor Josh Cummings on the latest-and-greatest in Spring Security 7

Hi, Spring fans! In this installment we talk to Spring Security contributor and legend Josh Cummings...

This Week in Spring - October 7th, 2025

Hi, Spring fans! How're you doing this fantastic October afternoon? I'm on a train returning from Frankfurt, Germany, where I spoke at the Cloud Foundry Day Frankfurt event about how awesome it is to build an application with Spring Boot and Cloud Foundry. Yesterday I was in Antwerp, Belgium, and...

A Bootiful Podcast: Spring Batch lead Mahmoud Ben Hassine

Hi, Spring fans! In this installment we talk to the legendary lead of the Spring Batch project, Mahmoud Ben Hassine, about the latest-and-greatest in Spring Batch in the Spring Boot 4 generation...

This Week in Spring - September 23rd, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring! I'm preparing my talks for several amazing shows including: Commit Your Code conference in Plano, Texas starting tomorrow; Dev2Next in Colorado; Devoxx Belgium in Antwerp, Belgium; and CloudFoundry Days in Germany. So much go...

Access API Moves to Spring Security Access

Five years ago, Spring Security began the journey of modernizing its authorization API. This has paved the way for a number of exciting features like Authorized POJOs, value masking, and, planned for Spring Security 7, Multi-Factor Authentication. This also deprecated the majority of the Access...

A Bootiful Podcast: José Paumard, Java developer advocate and professor

Hi, Spring fans! In this installment, recorded at Devoxx UK 2025, I talk to the legendary professor of computer science and legend José Paumard about Java, the ecosystem, and more,...

Hystrix Dashboard Proxy In spring-cloud-netflix-hystrix-dashboard

Spring Cloud Netflix, versions 2.2.x prior to 2.2.4, versions 2.1.x prior to 2.1.6, and older unsupported versions allow applications to use the Hystrix Dashboard proxy.stream endpoint to make requests to any server reachable by the server hosting the dashboard. A malicious user, or attacker, can...

Authentication Leak On Redirect With Reactor Netty HttpClient

Reactor Netty HttpClient, versions 0.9.x prior to 0.9.5, and versions 0.8.x prior to 0.8.16, may be used incorrectly, leading to a credentials leak during a redirect to a different domain. In order for this to happen, the HttpClient must have been explicitly configured to follow redirects...

DoS Via Malformed URL with Reactor Netty HTTP Server

Reactor Netty HttpServer, versions 0.9.3 and 0.9.4, is exposed to a URISyntaxException that causes the connection to be closed prematurely instead of producing a 400 response...

CSRF Attack via CORS Preflight Requests with Spring MVC or Spring WebFlux

Spring Framework, versions 5.2.x prior to 5.2.3 are vulnerable to CSRF attacks through CORS preflight requests that target Spring MVC spring-webmvc module or Spring WebFlux spring-webflux module endpoints. Only non-authenticated endpoints are vulnerable because preflight requests should not inclu...

RFD Attack via “Content-Disposition” Header Sourced from Request Input by Spring MVC or Spring WebFlux Application

In Spring Framework, versions 5.2.x prior to 5.2.3, versions 5.1.x prior to 5.1.13, and versions 5.0.x prior to 5.0.16, an application is vulnerable to a reflected file download RFD attack when it sets a “Content-Disposition” header in the response where the filename attribute is derived from use...

CVE-2026-41855

CVE-2026-41855...

cve-2026-47873 - HIGH - CVE-2026-47873: Spring Tools Docker integration publishes unauthenticated debug (JDWP) and JMX ports on all network interfaces

The Boot Dashboard Docker integration in Spring Tools publishes container control ports on all of the host's network interfaces 0.0.0.0 rather than restricting them to loopback...

A Bootiful Podcast: Dr. Kris De Volder on developer tooling for Spring developers and AI

Hi, Spring fans! In this installment we talk to Spring tooling legend Dr. Kris De Volder on tooling, AI, and so much more...

A Bootiful Podcast: engineer, CTO, teacher, and pilot Ken Sipe

Hi, Spring fans, JVM enjoyers, and cloud natives! Have I got a treat for you today! We're going to be talking to my longtime pal Ken Sipe. groovy java kotlin go rust spring jvm...

A Bootiful Podcast: Spring team engineer Dariusz Jędrzejczyk on the latest-and-greatest in the reactive world, MCP, and more

Hi, Spring fans! In this installment we talk to the Spring team engineer Dariusz Jędrzejczyk on the latest-and-greatest in the reactive world, MCP, and more...

A Bootiful Podcast: Intact's Luke Shannon

Hi, Spring fans! and happy holidays! in this installment I talk to Intact's Luke Shannon about their use of Spring, developer portals, and so much more...

This Week in Spring - September 24th, 2024

Hi, Spring fans! Welcome to another installment of This Week in Spring! I'm in delightful Dallas, TX, at the amazing JConf.dev show. Then I'm off to Germany, and then back home to do some laundry before heading out to Denver, CO, for the amazing Dev2Next show, before then heading out to Belgium f...