fix(deps): update ktor monorepo to v3.4.2

[renovate]

This PR contains the following updates:

Package	Change	Age	Confidence
io.ktor:ktor-server-cio	3.4.0 → 3.4.2
io.ktor:ktor-server-core	3.4.0 → 3.4.2
io.ktor:ktor-client-websockets	3.4.0 → 3.4.2
io.ktor:ktor-client-cio	3.4.0 → 3.4.2
io.ktor:ktor-client-core	3.4.0 → 3.4.2

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Release Notes

ktorio/ktor (io.ktor:ktor-server-cio)

v3.4.2

Compare Source

Published 27 March 2026

Improvements

• KTOR-9327 Curl: The WebSockets maxFrameSize option does not have an effect
• KTOR-9383 CaseInsensitiveString: reduce allocations
• KTOR-9385 Netty: Allocation micro-optimizations
• KTOR-9403 Darwin: Unnecessary ByteArray copy for each received response chunk
• KTOR-9412 KDoc for formFieldLimit documents incorrect default value (64 KB instead of 50 MiB)

Bugfixes

• KTOR-9351 OpenAPI: Incorrect schema generated for nested classes with lists
• KTOR-9361 WebSockets: JsWebSocketSession._closeReason is completed twice
• KTOR-9437 Fix GraalVM Compatibility
• KTOR-9424 Logging: OkHttp format should log the full requested URL
• KTOR-8540 Logging: IllegalStateException is thrown when response is cached and deserialization fails
• KTOR-9370 OpenAPI: NoSuchMethodError - getLOCAL_FUNCTION_FOR_LAMBDA with Kotlin 2.3.20-*
• KTOR-9421 Netty: active SSE connection blocks HTTP/2 response flushing for other requests
• KTOR-3390 JS browser: "Failed to execute 'digest' on 'SubtleCrypto'" error when using digest auth
• KTOR-5977 Compression: The encoders buffer streaming response
• KTOR-9393 Certificate pinning matches against all pins instead of hostname-scoped pins
• KTOR-8751 DI: AmbiguousDependencyException when named dependency is overridden in testApplication
• KTOR-9039 Bearer Auth: Request body transformed with jsonIO isn't sent over again after refreshToken request
• KTOR-9404 Darwin: Memory leak in KtorNSURLSessionDelegate
• KTOR-9399 LinkageError when running Ktor app with development mode inside Spring Boot / Amper fat-JAR
• KTOR-9402 NoSuchMethodError on RawWebSocket after 3.4.0
• KTOR-9372 Frame.Text.readText() causes infinite loop and 100% CPU on Kotlin/Native when WebSocket frame data is malformed or connection drops unexpectedly
• KTOR-9387 ZstdEncoder decode fails when source data is split into multiple Zstd frames

v3.4.1

Compare Source

Published 3 March 2026

Improvements

• KTOR-9382 HttpProtocolVersion.parse: fast path for common versions
• KTOR-9381 GMTDate: reduce allocations
• KTOR-8971 Support "operationId" in Kdoc for OpenAPI spec. gen.
• KTOR-9333 WebSockets: Infinite spin and potential OOM vulnerabilities in the Inflater.inflateFully method
• KTOR-5616 Ktor always adds by default an Accept-Charset header
• KTOR-9291 OpenAPI: handle atypical route functions
• KTOR-9293 OpenAPI describe needs defaults
• KTOR-9304 OpenAPI: Order of path parameters is not preserved in the spec
• KTOR-9353 Routing: TailcardSelector missing toString(), which clutters the logs

Bugfixes

• KTOR-9281 OpenApi code inference misses lambda argument bodies
• KTOR-9273 OpenAPI static content path appears in resulting model
• KTOR-9004 OpenAPI: No respective formats detected for serializable types like UUID or Instant
• KTOR-9305 OpenAPI: "No mapping for symbol: VAR FOR_LOOP_VARIABLE" error with codeInferenceEnabled=true
• KTOR-9279 OpenAPI: UnsupportedOperationException for a function with a reified type parameter codeInferenceEnabled = true
• KTOR-9289 OpenAPI: Resource routes are missing inferred and comment-based documentation
• KTOR-9330 OpenAPI: Cannot override kotlinx.serialization module
• KTOR-9320 OpenAPI: jsonSchema() does not unwrap Kotlin value classes (inline classes)
• KTOR-9352 Authentication: Creating JWT verifier fails for JWK with kty=EC and alg=null
• KTOR-9344 Flow invariant error happens after update to Ktor 3.4.0
• KTOR-9362 testApplication: Race condition in timeout coroutine when response is streaming
• KTOR-9274 Curl: Undefined symbol errors when linking on Linux since 3.4.0
• KTOR-8782 NodeJS CIO: "Module 'os' could not be imported" error on resolving WORKING_DIRECTORY_PATH with es2015 target
• KTOR-9348 String.decodeBase64String fails to decode when the input has no padding since 3.4.0
• KTOR-9318 CIO engine rejects valid certificates with unsupported signature algorithms
• KTOR-9331 Curl: Segfaults when working with WebSockets
• KTOR-9334 Coroutines in route handlers are dispatched with Dispatchers.Unconfined since 3.2.0
• KTOR-9339 StreamResetException is not propagated to the caller of StreamRequestBody.writeTo since 3.4.0
• KTOR-9329 HTMX: "on" attributes extension not working
• KTOR-9316 WasmJS bad get and set implementations for Uint8Array and ArrayLike
• KTOR-9272 JSON schema inference does not recognize unsigned types
• KTOR-9211 SendCountExceedException when request is sent twice with maxRetries = 0 since 3.3.2
• KTOR-9285 RateLimit: Milliseconds in the Retry-After header are truncated
• KTOR-7512 JWT: Docs for validate method claim that it's optional, but it isn't
• KTOR-9269 Incorrect dependency declaration in swagger / openapi
• KTOR-9372 Frame.Text.readText() causes infinite loop and 100% CPU on Kotlin/Native when WebSocket frame data is malformed or connection drops unexpectedly

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