Spring Boot 4.1 Adds gRPC Auto-Configuration, SSRF Mitigation, and Kotlin 2.3 Support
Broadcom released Spring Boot 4.1 on June 10, 2026, to deliver gRPC auto-configuration, HTTP-client SSRF mitigation, and upgrades to Kotlin 2.3. It also brings lazy datasource connections, async context propagation for @Async methods, and improved OpenTelemetry support. Uncharacteristically, Broadcom moved the releases twice, first from May 11-22 to June 1-5, then to June 8-12. By Karsten Silz
The continuous evolution of enterprise software frameworks, driven by developer demand for efficiency, security, and modern communication protocols, necessitates regular updates like this.
This update improves critical enterprise infrastructure components, enhancing security, interoperability with modern backend services like gRPC, and developer productivity for a significant segment of software development.
Developers using Spring Boot now have streamlined integration with gRPC, improved security against SSRF attacks, and access to newer Kotlin language features, directly impacting project development cycles and application robustness.
- · Developers using Spring Boot
- · Enterprises running Spring Boot applications
- · Kotlin programming language ecosystem
- · gRPC adoption
- · Vulnerabilities exploiting SSRF in older Spring Boot versions
- · Less secure or harder-to-integrate legacy communication protocols
Enterprise applications built with Spring Boot will become more secure and better integrated with modern microservices architectures.
Improved security and efficiency could slightly accelerate the migration of monolithic applications to microservices for some organizations.
The enhanced gRPC support may subtly contribute to the broader industry adoption of gRPC as a primary inter-service communication protocol over traditional REST.
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