Authorization Bypass of Static Resources in WebFlux Applications

Spring WebFlux applications that have Spring Security authorization rules on static resources can be bypassed under certain circumstances. For this to impact an application, all of the following must be true:...

A Bootiful Podcast: Spring Cloud Dataflow, Spring Cloud Task, and Spring Batch legend Glenn Renfro

Hi, Spring fans! In this installment, I talk to Spring Cloud Dataflow, Spring Cloud Task, and Spring Batch legend Glenn Renfro...

This Week in Spring - August 6th, 2024

It's August! Egads, has that come quickly! AUGUST. The eigth month of the year, and we're almost done with the first week, in fact! It's not that I'm not grateful to be here, but, yah, wow that was quick. And, of course, the month of my all time double dutch favorite conference, SpringOne,...

Spring Tips: Proxies

Hi, Spring fans! In this installment we look at the use of JDK and CGLIB-based proxies in Spring, and demystify their application Java SpringBoot SpringFramework Architecture DesignPatterns oop...

Spring Tips: GRPC

Hi, Spring fans! In this installment, we look at how to create GRPC-based services with Spring Boot...

Spring Framework 6.2.0-M1: all the little things

The Spring Framework team has been busy reviewing the issue tracker in anger and reducing the number of opened issues. This was long overdue, with a number of issues being invalid or superseded in the meantime. This helped the team focusing on a more manageable amount of issues and we used the...

Spring Tips: the Spring Expression Language

Hi, Spring fans! In this installment, I look at the excellent Spring Expression Language, an embedded language for resolving simple expressions that is built right into the Spring Framework...

Spring Boot Testjars founder Rob Winch

Hi, Spring fans! In this week's installment we talk Rob Winch, lead of Spring Security and founder of the exciting new project Spring Boot Testjars...

local information disclosure via temporary directory created with unsafe permissions

In Spring Cloud Contract, versions 4.1.x prior to 4.1.1, versions 4.0.x prior to 4.0.5, and versions 3.1.x prior to 3.1.10, test execution is vulnerable to local information disclosure via temporary directory created with unsafe permissions through the shaded com.google.guava:guava dependency in...

Spring Framework server Web DoS Vulnerability

In Spring Framework versions 6.0.15 and 6.1.2, 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: Typically, Spring Boot applications need the...

This Week in Spring - December 19th, 2023

Hi, Spring fans! Welcome to another oh-so-festive edition of This Week in Spring! the Spring Authorization Server 1.2.1, 1.1.14, and 0.4.5, are now available Spring AMQP 3.1.1 is now available Spring Security 5.8.9, 6.1.6, 6.2.1 are now available Spring for Apache Kakfa 3.1.1 is now available...

A Bootiful Podcast: GraalVM founder and Oracle vice president Thomas Wuerthinger

Hi, Spring fans! In this installment Josh Long talks to Oracle vice president Thomas Wuerthinger about the project he created and leads, GraalVM. This was recorded live from Devoxx Belgium 2023!...

A Bootiful Podcast: Spring Security lead Rob Winch

Hi, Spring fans! Welcome to another installment of a Bootiful Podcast. In this interview, Josh Long @starbuxman talks to Spring Security legend and lead Rob Winch @robwinch, recorded live from SpringOne 2023!...

A Bootiful Podcast: Spring team legend Dr. David Syer on view rendering technologies, the latest-and-greatest, SpringOne 2023, and more

Hi, Spring fans! In this installment Josh Long talks to the legendary Dr. David Syer about view rendering technologies, SpringOne, and more. Have you registered for SpringOne yet? Are you interested in learning Spring? Check out Spring Academy...

A Bootiful Podcast: Spring Framework and Spring Boot legend Stéphane Nicoll on a Bootiful Podcast

Hi, Spring fans! Welcome to another installment of A Bootiful Podcast! In this installment, Josh Long talk to Spring team legend Stéphane Nicoll @snicoll about Spring Boot, Apache Maven and Gradle, his journey to the Spring team, and so much more. This episode was recorded live from beautiful...

A Bootiful Podcast: Micrometer lead Tommy Ludwig

Hi, Spring fans! In this installment, Josh Long talks to Micrometer lead Tommy Ludwig, recorded from beautiful Barcelona, Spain during the fabulous Spring I/O event!...

A Bootiful Podcast: Spring Boot team member Moritz Halbritter (@m_halbritter)

Hi, Spring fans! In this installment Josh Long YouTube.com/@coffeesoftware.com talks to Spring Boot team member Moritz Halbritter @mhalbritter...

A Bootiful Podcast: Grubhub's Josh Burns on Kotlin, Spring Boot, and more

We're crossing the streams, again! This time Josh Long talks to Grubhub's John Burns twitter: @wakingrufus mastodon: @[email protected] about dogfooding human food, Grubhub's tech stack, and more...

A Bootiful Podcast: James Ward, Kotlin Product Manager at Google

Hi, Spring fans! In this installment Josh Long talks to James Ward, Kotlin Product Manager at Google...

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:...

A Bootiful Podcast: It's Glenn Renfro! Listen to this episode if you want to feel better

Hi, Spring fans! Today Josh Long @starbuxman talks to Atlanta JUG, Devnexus, Spring Cloud Task, Spring Integration, Spring Cloud Dataflow luminary, and the living embodiment of the word "joy:" Glenn Renfro @cppwfs Watch the podcast in living color on Youtube!...

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...

This Week in Spring - November 15th, 2022

Hi, Spring fans! Howre you doin this fine Tuesday morning? Ive returned home to San Francisco and am up and at em nice and early to catch a flight to Seattle, where Ill speak at the Java User Group tonight. If youre in Seattle, dont miss it! Weve got a ton of cool stuff to get into this week, but...

Spring Session 3.0.0-RC1

Spring Session 3.1.0-RC1 has been released. The biggest news from this release is that Spring Session Geode was removed which means all of the Spring Modules now belong to the same lifecycle. This means that the Spring Session BOM no longer uses CalVer and instead uses the same version as the...

Bootiful Podcast: Spring Framework contributor Sébastien Deleuze on GraalVM, AOT, project Leyden, and WebAssembly

Hi, Spring fans! In this installment, Josh Long @starbuxman talks to Spring Framework contributor Sébastien Deleuze @sdeleuze on GraalVM, AOT, project Leyden, and WebAssembly...

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...

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...

Directory Traversal with spring-cloud-config-server

Spring Cloud Config, versions 2.2.x prior to 2.2.3, versions 2.1.x prior to 2.1.9, 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...

Directory Traversal with Spring MVC on Windows

Spring Framework versions 5.0 to 5.0.4, 4.3 to 4.3.14, and older unsupported versions allow applications to configure Spring MVC to serve static resources e.g. CSS, JS, images. When static resources are served from a file system on Windows as opposed to the classpath, or the ServletContext, a...

Spring Batch Admin vulnerable to Cross Site Request Forgery

Spring Batch Admin does not contain Cross Site Request Forgery CSRF protection, which may allow an attacker to craft a malicious site that executes requests to Spring Batch Admin...

Stored XSS in file upload of Spring Batch Admin

Cross-site scripting XSS vulnerability in the file upload feature of Spring Batch Admin allows a remote attacker to inject arbitrary web script or HTML via a crafted request related to the file upload functionality...

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...

Remote Code Execution (RCE) in Spring Security OAuth

When processing authorization requests using the whitelabel views, the responsetype parameter value was executed as Spring SpEL which enabled a malicious user to trigger remote code execution via the crafting of the value for responsetype...

CVE-2026-41850

CVE-2026-41850...

cve-2026-47864 - MEDIUM - Unsafe Java deserialization in SerializingHttpMessageConverter — remote code execution

cve-2026-47864 - MEDIUM - Unsafe Java deserialization in SerializingHttpMessageConverter — remote code execution...

cve-2026-59277 - LOW - Spring Security InetAddressMatchers Incomplete Internal Network Classification

cve-2026-59277 - LOW - Spring Security InetAddressMatchers Incomplete Internal Network Classification...

cve-2026-47850 - MEDIUM - Spring Data REST allows mutation of the version property of immutable aggregates via PUT

cve-2026-47850 - MEDIUM - Spring Data REST allows mutation of the version property of immutable aggregates via PUT...

cve-2026-41707 - HIGH - Spring Security DPoPProofJwtDecoderFactory vulnerable to DPoP Proof Replay

cve-2026-41707 - HIGH - Spring Security DPoPProofJwtDecoderFactory vulnerable to DPoP Proof Replay...

cve-2026-47889 - MEDIUM - Spring Framework sameSite Attribute Dropped in JettyCoreServerHttpResponse

cve-2026-47889 - MEDIUM - Spring Framework sameSite Attribute Dropped in JettyCoreServerHttpResponse...

cve-2026-47888 - MEDIUM - Spring Framework Memory Leak via SETUP Frame in RSocketMessageHandler

cve-2026-47888 - MEDIUM - Spring Framework Memory Leak via SETUP Frame in RSocketMessageHandler...

cve-2026-41003 - HIGH - Unencoded HTML Outputs in Spring Security May Allow Cross-Site Scripting

cve-2026-41003 - HIGH - Unencoded HTML Outputs in Spring Security May Allow Cross-Site Scripting...

cve-2026-41695 - HIGH - Denial of Service in Spring Data Commons Property Path Resolution

cve-2026-41695 - HIGH - Denial of Service in Spring Data Commons Property Path Resolution...

cve-2026-41715 - MEDIUM - Reactor Netty HTTP Client Leaks Credentials On Protocol Downgrade Redirect

cve-2026-41715 - MEDIUM - Reactor Netty HTTP Client Leaks Credentials On Protocol Downgrade Redirect...

This Week in Spring - May 19th, 2026

Hi Spring fans! Welcome to another installment of This Week in Spring!, this one written from the back of a taxi racing to the local Frankfurt train station, where I'll take a train to Munich for the amazing Kotlin Conf 2026 edition, where I'll be part of the keynote and deliver a talk on the...

Server-Side Request Forgery via Filter Expression Keys in Neo4jVectorStore

spring-ai-neo4j-store contains a Cypher injection vulnerability in Neo4jVectorFilterExpressionConverter . When a user-controlled string is passed as a filter expression key in Neo4jVectorFilterExpressionConverter of spring-ai-neo4j-store , doKey embeds the key into a backtick-delimited Cypher...

Blending Chat with Rich UIs with Spring AI and MCP Apps

The way humans typically interact with AI is via a chat-style interface such as ChatGPT or Claude Desktop. In fact, the ability to converse with an AI in natural language is perhaps one of the most amazing things about this technology. It lets humans talk to computers in human terms, rather than...

This Week in Spring - October 28th, 2025

Hi, Spring fans! Welcome to another installment of This Week in Spring! It's a wonderful tuesday here in my home town of San Francisco as I write this from my condo's balcony, fresh off more than three weeks on the road. By the time we'll speak again in a week, Halloween will have come and gone...

Introducing Share Consumer Support (Kafka Queues) in Spring for Apache Kafka

Continuing our Road to GA series, this week we're exploring Share Groups in Apache Kafka 4.0.0 and their integration in Spring for Apache Kafka 4.0.0 - a feature that fundamentally expands how we can consume messages from Kafka topics. When we first start working with Kafka, the mental model is...

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...