NestJS 11.1.20 release notes, 13 May 2026

core, testing
- #16939 fix(core): fix deeply nested transient providers resolution (@kamilmysliwiec)
core
- #16861 fix(core): fix @Sse losing events on complete (@MatthiasBrehmer)
- #16753 fix(core): defer sse writehead until after lifecycle completes (@jkalberer)
- #16782 fix(core): use strict null check for SSE message id (@burhanharoon)
microservices
- #16850 fix(microservices): ServerRMQ crashes at boot when @MessagePattern(undefined) is combined with wildcards: true (@lavieennoir)
common
- #16845 fix(common): accept zero timestamp in parse date pipe (@Mysh3ll)
platform-socket.io
- #16742 fix(socket.io): Deduplicate disconnect listener in bindMessageHandlers (@fru1tworld)

microservices
- #16676 feat(microservices): add return buffers option for binary data (@Forceres)
- #16826 feat(microservices): handle rmq blocked/unblocked connection events (@thisalihassan)
common
- #16902 fix(common): filetype validator buffer message (@QusaiAlbonni)
platform-express
- #16844 feat(platform-express): add defParamCharset to MulterOptions (@starnayuta)

platform-ws
- #16941 chore(deps): bump ws from 8.20.0 to 8.20.1 (@dependabot[bot])