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chore(deps): update nest monorepo to v12.2.0 - #27

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Oct 20, 2026
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This PR contains the following updates:

Package Change Age Confidence
@nestjs/common (source) 12.1.3 → 12.2.0 age confidence
@nestjs/core (source) 12.1.3 → 12.2.0 age confidence
@nestjs/microservices (source) 12.1.3 → 12.2.0 age confidence
@nestjs/platform-express (source) 12.1.3 → 12.2.0 age confidence
@nestjs/platform-fastify (source) 12.1.3 → 12.2.0 age confidence
@nestjs/platform-ws (source) 12.1.3 → 12.2.0 age confidence
@nestjs/testing (source) 12.1.3 → 12.2.0 age confidence
@nestjs/websockets (source) 12.1.3 → 12.2.0 age confidence

Release Notes

nestjs/nest (@​nestjs/common)

v12.2.0

Compare Source

v12.2.0 (2026-10-19)
Notable changes

New options

  • @Sse({ maxPendingDataLength }) sets how many characters of event data may wait for a client that is not reading its events (4M by default; 0 or Infinity lifts the limit) – 2f05ad954e
  • IoAdapter and WsAdapter take maxConcurrentMessages, the number of a client's messages handled at once (1000 by default; Infinity lifts it) – 0bd0810ed7
  • ValidationPipe takes maxErrorMessagesLength (1,000,000 characters by default); messages past it are replaced by a "Further validation errors were omitted" entry – 086c1c514f
  • Kafka: parser.maxMessageSize (16 MiB after decompression by default); larger messages are logged and skipped – 9bdf844fca
  • TCP server: drainTimeout (30 s by default, 0 disables) disconnects a peer that leaves its responses unread – 583d6077ad
  • MQTT server: reconnectOnConnackError is now enabled by default, so a refused connection attempt is retried; set it to false for the previous behaviour – a63cea600a
  • HttpServer.getRouteMatchingOptions(), an optional adapter hook that tells core how the router matches paths (see "Middleware exclusions" below) – 08d8677c8d

New defaults and behaviour changes

  • @nestjs/platform-express, @nestjs/platform-fastify: fieldNestingDepth and fieldArrayIndexLimit (#​18074) now default to 32 and 1000; set them to Infinity to lift the limits – 94fcc93770
  • ValidationPipe validates with validationError.target: false unless the options set it, so an exceptionFactory that reads error.target gets undefined; set validationError.target to true for the old errors – 8c5a59bf63
  • ValidationPipe answers an array or a primitive sent for a validated class with a 400 – 197371c1f3
  • FileTypeValidator matches a string fileType up to the end of a name (e.g. font/woff no longer accepts font/woff2; use a RegExp for that) – 770c6f1a19
  • @SerializeOptions({}) on a handler no longer turns off the class schema – d27cb7017f
  • BaseExceptionFilter answers http-errors errors created with expose: false (the default from 500) with the standard reason phrase instead of their message – 9ed572f853
  • A StreamableFile error still gets a 400, but the body no longer carries the error message – 2f28d91afb
  • Files uploaded with a request that a pipe rejected are removed from storage – acb98de89e
  • @nestjs/platform-fastify: a route with fileSize: undefined (or null) falls back to the plugin's limit; set it to Infinity to keep uploads unlimited – dd549e1a74
  • @nestjs/platform-express: object error bodies are sent as application/json on routes with a non-JSON Content-Type – 7dc6e349d5
  • ConsoleLogger in JSON mode cuts a record short past about a million characters – ad4915eaa3
  • A global enhancer that the injector failed to instantiate now fails the application at startup – ae78524ced
  • A request- or transient-scoped APP_FILTER now logs a startup warning, as it only applies to exceptions thrown from controllers – df5275c5e1
  • Microservices: a pattern key longer than 256 characters matches no handler – accd27e66c
  • Kafka: a message may carry up to 10,000 header values (e419ff540b); headers given as a string or array are not sent (312777743f); reply headers are decoded as text (ee94f6aaae)
  • gRPC: request streams are paused while their replies wait to be written – 37e5cf7706
  • Deprecation: on TCP, Redis, NATS, MQTT and RabbitMQ, an @EventPattern() handler that replies to ClientProxy#send() now logs a deprecation warning. The reply is unchanged; in the next major version event handlers will not reply to send(), as on Kafka already – ba3668d36b

Middleware exclusions

  • MiddlewareConsumer.exclude() now compiles excluded routes with the router's case and trailing-slash matching (08d8677c8d). Update @nestjs/core together with @nestjs/platform-express / @nestjs/platform-fastify: with an adapter that does not implement getRouteMatchingOptions(), excluded routes are matched exactly (f5aa875e40), so on a lenient router other spellings of an excluded path run the middleware.
  • With header, media type or custom versioning, exclude({ path, method, version }) and enableCsrfProtection({ exclude }) apply only to requests that ask for one of the excluded versions – 1a7a31fa46
  • @nestjs/platform-fastify: the request hook used by enableCsrfProtection() and useSecurityHeaders() now runs before Nest and app.use() middleware with NestFactory.create() too, including middleware registered before either call, as it already did with Test.createNestApplication() – 8351806290
Bug fixes
Enhancements
Docs
Dependencies
Committers: 15

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@renovate
renovate Bot merged commit 07cd324 into master Oct 20, 2026
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@renovate
renovate Bot deleted the renovate/nest-monorepo branch October 20, 2026 11:37
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