Spring Boot 4.1 GA Delayed: Release Train Moves to June 1-5
The Spring team has announced a schedule adjustment for the May release train, pushing the planned May 11-22 window back to June 1-5, 2026. The change affects the entire Spring portfolio simultaneously — Spring Boot 4.1, Spring Framework 7.1, Spring Security 7.1, Spring Data 2026.0, Spring Integration 7.1, Spring Modulith 2.1, and all other open-source Spring projects in the GA pipeline.
For teams running Spring Boot 4.0.x who are planning their upgrade timeline to 4.1, the practical implication is a three-week slip in the earliest possible GA migration date. The RC1 releases that shipped in late April confirmed the core API shapes — Boot 4.1's OTLP SDK exporter environment variable support, Spring Security 7.1's anyOf() authorisation manager, Spring Modulith 2.1's @ModuleSlicing annotation — so the feature set is not in question, only the delivery timing. Teams using dependency management tools like Renovate or Dependabot should expect the GA dependency updates to land in their pull request queues around June 2-3.
The Spring team did not specify a root cause for the delay in the announcement post, describing it simply as ensuring sufficient time to finalise the significant updates in this release cycle while maintaining ecosystem stability. The official Spring Release Calendar at calendar.spring.io has been updated to reflect the new dates and is the authoritative reference for project-specific GA windows within the June 1-5 range.
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