Published 29 October 2026 Improvements KTOR-10005 Native accepted TCP sockets do not enable TCP_NODELAY, unlike JVM KTOR-9966 Netty poor performance on delay calls KTOR-4206 The "com.typesafe.config.ConfigException$Missing" exception leaks from the typesafe config library when configuration is merged Bugfixes KTOR-10037 CIO: keep-alive connection hangs when a response fails before writing any byte…
Published 16 September 2026 Features KTOR-8596 OpenID Connect (OAuth2) auto-discover & configuration KTOR-9645 Client curated multi-platform facade module KTOR-8883 Support nested jars in static resources KTOR-8672 Support at least zstd and deflate formats of precompressed files KTOR-8595 Auth JWK Support (auto-discover) KTOR-9841 OIDC Server Plugin KTOR-9654 Override fetch in JS engine KTOR-9785…
Published 31 July 2026 Improvements KTOR-8032 RateLimit: Allow limit requests based on authentication result KTOR-9719 ApplicationCall.isStaticContent returns false when called from plugin interceptors KTOR-8450 ContentNegotiation: it doesn't handle content type suffixes KTOR-7892 SwaggerUI: Missing oauth2-redirect.html support in the plugin KTOR-9759 Reject whitespace in URL hosts during parsing…
Published 25 June 2026 Improvements KTOR-9492 OpenAPI plugin: handle requireXxx functions in compiler plugin KTOR-9569 Add more details for KDoc of BearerAuthConfig.sendWithoutRequest KTOR-9571 Add KDoc for BearerAuthConfig.realm KTOR-9570 Add Kdoc for BearerAuthConfig.refreshTokens Bugfixes KTOR-9646 Fix Kotlin 2.4.0 compiler plugin breaking changes KTOR-9585 OpenAPI: JsonSchema title is truncate…
Published 14 May 2026 Features KTOR-8421 Route.contentType should support multiple ContentType KTOR-7961 Add known TDM headers to the HttpHeaders object KTOR-9418 Support getAs from the root ApplicationConfig KTOR-9559 DNS configuration for the Apache5 client KTOR-9554 DNS configuration for OkHttp client engine KTOR-9555 Custom SSE heartbeat function KTOR-8914 Dependency injection: read annotation…
Published 22 April 2026 Bugfixes KTOR-9451 OpenAPI schema inference not working for custom nested generics KTOR-9490 OpenAPI: Self-referential schema $ref uses FQN while schema is registered with a simple name KTOR-9463 OpenAPI: schema inference StackOverflow KTOR-8938 WebSockets: WebSockets handler does not inherit server coroutine context KTOR-8989 Shared engine is closed when a client created w…
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-93…
Published 22 January 2026 Features KTOR-8316 Support OpenAPI specification for the Ktor Client and Server Application KTOR-9085 Read OpenAPI security details from authentication plugin KTOR-8993 Use runtime-generated spec for OpenAPI / Swagger plugins KTOR-9086 Read OpenAPI default content type information from ContentNegotiation plugin KTOR-8859 Routing documentation compiler plugin KTOR-8936 Rou…
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 a…
Published 26 November 2025 Improvements KTOR-6837 Discrepancies when parsing URL host with CIO and Darwin engines compared to the rest engines KTOR-9050 Logging: SimpleLogger should be an object, not a class KTOR-9094 Jetty Client: Support HTTP/2 over cleartext (h2c) KTOR-9120 OpenAPI gen: missing operationId for KDoc fields KTOR-3019 Improve logging for CORS plugin Bugfixes KTOR-8671 Netty: Rejec…
Published 5 November 2025 Improvements WebRTC Client. Remove redundant targets (KTOR-9062) Add Socks proxy support to Darwin engine (KTOR-8968) Java: Improve error message when SOCKS proxy is used (KTOR-2908) Bugfixes HttpRequestRetry: SendCountExceedException when max retries is more than maxSendCount of HttpSend (KTOR-5850) Darwin: The maxFrameSize option has no effect (KTOR-6963) OpenAPI: Stack…
Published 8 October 2025 Improvements Add a note about SSE session lifetime in KDoc (KTOR-8440) Update Kotlin to 2.2.20 (KTOR-8896) Bugfixes NumberFormatException when Content-Length header value contains null bytes (KTOR-4828) SerializationException: Serializer for class 'ClientSSESession' is not found when server responds with JSON (KTOR-7631) Netty: loadConfiguration missing enableHttp2 and ena…
Published 11 September 2025 Features Support for server side http2 without tls (h2c) (KTOR-4750) OpenAPI generation build extension preview (KTOR-8721) Serve static resources with caching headers and ETag based on sha256 of content (KTOR-6700) Jetty engine: Upgrade Jetty dependencies to the latest version 12 (KTOR-6734) Static content: Support a custom respond logic if the file is not found (KTOR-…