Access Control Bypass in Spring Security

When using Spring Security's CAS Proxy ticket authentication a malicious CAS Service could trick another CAS Service into authenticating a proxy ticket that was not associated. This is due to the fact that the proxy ticket authentication uses the information from the HttpServletRequest which is...

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...

CVE-2026-41732

CVE-2026-41732...

cve-2026-47856 - MEDIUM - JsonToObjectTransformer resolves the json__TypeId__ message header to an arbitrary class without an allow-list

cve-2026-47856 - MEDIUM - JsonToObjectTransformer resolves the jsonTypeId message header to an arbitrary class without an allow-list...

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-2026-47857 - MEDIUM - Reactor Core windowTimeout fair-backpressure stream hang due to 20-bit index wrap-around

cve-2026-47857 - MEDIUM - Reactor Core windowTimeout fair-backpressure stream hang due to 20-bit index wrap-around...

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

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

This Week in Spring - July 28th, 2026

Hi Spring fans! Welcome to another installment of This Week in Spring! The title says in Spring , but here in the northern hemisphere, it's clearly the middle of summer. Hot! I'm sitting here on my laptop on a warm summer day, and my laptop is indeed hot because I've spent so much time outside...

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-2026-40988 - HIGH - Unbounded DEFLATE Inflation in SAML 2.0 Service Provider

cve-2026-40988 - HIGH - Unbounded DEFLATE Inflation in SAML 2.0 Service Provider...

cve-2026-41710 - MEDIUM - Cache Exhaustion in Stateful Retries leads to Denial of Service

cve-2026-41710 - MEDIUM - Cache Exhaustion in Stateful Retries leads to Denial of Service...

cve-2026-40984 - HIGH - Micrometer HTTP server instrumentations DoS vulnerability

cve-2026-40984 - HIGH - Micrometer HTTP server instrumentations DoS vulnerability...

This Week in Spring - May 12th, 2026

Hi, Spring fans! As I write this I am in Miami, FL at the CodeRemix.ai show, focused on the wide and wonderful world of OpenRewrite and Moderne. I've got a talk to give so let's dive right into it! a quick note about the upcoming release train dates in last week's installment of A Bootiful Podcas...

This Week in Spring - April 21st, 2026

Hi Spring fans! Welcome to another installment of This Week in Spring! What a week it's been since we last talked. I was in Barcelona, Spain, for the amazing Spring I/O event there. It has become my favorite show, full stop. Just such an amazing experience. So many wonderful things going on there...

Spring Office Hours Podcast: S5E12 - Developer Soft Skills with Arun Gupta

Join Dan Vega and DaShaun Carter for another essential update from the Spring ecosystem. In this episode, the guys are joined by DevRel and Java legend Arun Gupta to discuss a topic often overlooked but vital for career longevity: soft skills for developers. Drawing from his decades of experience...

A Bootiful Podcast: Mark Kropf on AI orchestration

Hi Spring fans! I was delighted to get a chance to sit and talk to my pal and Pivotal alum Mark Kropf about his efforts around orchestrating AI. This doesn’t have to do with the JVM or Spring, per se, but it’s an interesting discussion nonetheless...

A Bootiful Podcast: Oracle VP and GraalVM founder Thomas Wuerthinger

Hi, Spring fans! In this installment I talk to Oracle VP and GraalVM founder Thomas Wuerthinger, recorded at Devoxx 2025!...

The state of HTTP clients in Spring

This is a new blog post in the Road to GA series, this time exploring the new capabilities of our HTTP clients. This is also a good time to reflect on the state of HTTP clients in Spring, so we will use this opportunity to explain an important announcement: we are officially deprecating...

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...

This Week in Spring - September 16th, 2025

Hi, Spring fans! Welcome to another extra special installment of This Week in Spring , wherein we celebrate a very auspicious day indeed: the release of Java 25 and GraalVM 25! That's right: an incredible new iteration of the JVM has just dropped and with it come a ton of features! Let's go throu...

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...

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: Spring Security lead Rob Winch on Spring Security 7.0, SpringOne 2025, and more

Hi, Spring fans! In this installment I'm joined by Spring Security lead Rob Winch to discuss the amazing new additions to Spring Security 7.0, coming in November of 2025, and the coverage you can expect when you see our talk at SpringOne 2025 have you registered - https://springone.io ?...

A Bootiful Podcast: V Körbes on security from the platform on up

Hi, Spring fans! In today's extra special installment I talk to Broadcom's V Körbes who works on security above and below the application...

A Bootiful Podcast: AWS Developer Advocate and industry legend James Ward

Hi, Spring fans! In this installment I talk to AWS Developer Advocate and industry legend James Ward about AWS Bedrock, Amazon Cohere, Spring AI, MCP, and so much more!...

A Bootiful Podcast: Apache Causeway’s Dan Haywood

Hi, Spring fans! In this installment I talk to the legendary Dan Haywood, contributor to the Apache Causeway project...

A Bootiful Podcast: the amazing K. Siva Prasad Reddy (SivaLabs)

Hi, Spring fans! In today's installment I talk to industry legend K. Siva Prasad Reddy @sivalabs. You've probably read one of his blogs. I know I have!...

Audio Multimodality: Expanding AI Interaction with Spring AI and OpenAI

This blog post is co-authored by our great contributor Thomas Vitale. OpenAI provides specialized models for speech-to-text and text-to-speech conversion, recognized for their performance and cost-efficiency. Spring AI integrates these capabilities via Voice-to-Text and Text-to-Speech TTS. The ne...

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: Observability legend Jonatan Ivanov on the latest and greatest in Micrometer

Hi, Spring fans! In this installment we talk to observability legend Jonatan Ivanov about the latest and greatest in the wide and wonderful world of observability. Turns out a library that's used by countless projects including and beyond the Spring ecosystem keeps quite busy!...

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!...

A Bootiful Podcast: VMware vice president Betty Junod

Hi, Spring fans! In this installment Josh Long talks to VMware vice president Betty Junod about VMware, its amazing ecosystem, and so much more...

A Bootiful Podcast: Angular Google Developer Expert Santosh Yadav

Hi, Spring fans! In this installment Josh Long @coffesoftware talks to Angular Google Developer Expert Santosh Yadav @santoshyadavdev about the latest and greatest in the JavaScript and Angular ecosystem...

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 Expression DoS Vulnerability

In Spring Framework versions 6.0.0 - 6.0.6, 5.3.0 - 5.3.25, 5.2.0.RELEASE - 5.2.22.RELEASE, and older unsupported versions, it is possible for a user to provide a specially crafted SpEL expression that may cause a denial-of-service DoS condition...

Privilege Escalation in spring-security-oauth2-client

Spring Security, versions 5.7 prior to 5.7.5 , and 5.6 prior to 5.6.9 , and older unsupported versions could be susceptible to a privilege escalation under certain conditions. A malicious user or attacker can modify a request initiated by the Client via the browser to the Authorization Server whi...

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 - August 1st, 2022

Aloha, Spring fans! Welcome to another installment of This Week in Spring! Im still on vacation on the beautiful island of Maui, Hawaii, but I wanted to say hello "aloha!" and share this weeks latest roundup of all thats good and glorious in the wide and wonderful world of Springdom. Funny thing,...

A Bootiful Podcast: Devoxx UK organizer and VoxxedDays cofounder Mark Hazell on running great conferences

Hi, Spring fans! In this installment, Josh Long @starbuxman talks to Devoxx UK organizer and Voxxed Days cofounder Mark Hazell @mrhazell...

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...

Spring Cloud Gateway Code Injection Vulnerability

Applications using Spring Cloud Gateway are vulnerable to a code injection attack when the Gateway Actuator endpoint is enabled, exposed and unsecured. A remote attacker could make a maliciously crafted request that could allow arbitrary remote execution on the remote host...

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...

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...

Insecure Randomness When Using a SecureRandom Instance Constructed by Spring Security

Spring Security versions 4.2.x prior to 4.2.12, 5.0.x prior to 5.0.12, and 5.1.x prior to 5.1.5 contain an insecure randomness vulnerability when using SecureRandomFactoryBeansetSeed to configure a SecureRandom instance. In order to be impacted, an honest application must provide a seed and make...

Open Redirector in spring-security-oauth2

Spring Security OAuth, versions 2.3 prior to 2.3.5 , and 2.2 prior to 2.2.4 , and 2.1 prior to 2.1.4 , and 2.0 prior to 2.0.17 , and older unsupported versions could be susceptible to an open redirector attack that can leak an authorization code. A malicious user or attacker can craft a request t...

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...

Cross Site Tracing (XST) with Spring Framework

Spring Framework versions 5.0.x prior to 5.0.7, versions 4.3.x prior to 4.3.18, and older unsupported versions allow web applications to change the HTTP request method to any HTTP method including TRACE using the HiddenHttpMethodFilter in Spring MVC. If an application has a pre-existing XSS...

Data Binding Expression Vulnerability in Spring Web Flow

Applications that do not change the value of the MvcViewFactoryCreator useSpringBinding property which is disabled by default i.e. set to “false” can be vulnerable to malicious EL expressions in view states that process form submissions but do not have a sub-element to declare explicit data bindi...