Issues

• [BUG] Description HTML2 generator: needs helpers.js

  Issue: Bug
  OpenAPITools/openapi-generator#25228 · Filter by author ascotto-rm opened on Oct 12, 2026

• [BUG][Java][Spring] 7.26.0 regression: oneOf interface getter for the discriminator is typed with the name of a primitive-alias schema that has no model ("cannot find symbol")

  OpenAPITools/openapi-generator#25226 · Filter by author cmuchinsky opened on Oct 12, 2026

• [BUG][csharp] Map responses emit {packageName}.Model.Dictionary instead of System.Collections.Generic.Dictionary

  OpenAPITools/openapi-generator#25224 · Filter by author kborys-onerail opened on Oct 12, 2026

• [BUG][KOTLIN] multiplatform/jvm-ktor: DELETE without requestBody sends "Content-Type: application/json" with an empty body

  Issue: Bug
  OpenAPITools/openapi-generator#25223 · Filter by author rlnt opened on Oct 12, 2026

• [BUG][csharp][restsharp] throwOnAnyError: oneOf/anyOf deserialization failure on 2xx escapes as InvalidDataException instead of ApiException

  Issue: Bug
  OpenAPITools/openapi-generator#25218 · Filter by author mszopa-foss opened on Oct 12, 2026

• [REQ] enhance useBeanValidation to generate @Valid for the returned objects too

  Enhancement: Feature
  OpenAPITools/openapi-generator#25214 · Filter by author LeosBitto opened on Oct 11, 2026

• [BUG][C#][generichost] Generic enum converter overrides schema-specific converters for arrays

  OpenAPITools/openapi-generator#25206 · Filter by author alexaka1 opened on Oct 9, 2026

• [REQ][swift6] Don't pretty-print JSON request bodies

  OpenAPITools/openapi-generator#25186 · Filter by author spigo opened on Oct 8, 2026

• [BUG][swift6][alamofire] JSON decoding and file downloads run on the main thread

  OpenAPITools/openapi-generator#25185 · Filter by author spigo opened on Oct 8, 2026

• [BUG][swift6] Request builders crash the app (fatalError) on unsupported input and silently drop bodies that fail to encode

  OpenAPITools/openapi-generator#25183 · Filter by author spigo opened on Oct 8, 2026

• [BUG][CORE] 7.26.0: several inlineSchemaNameMappings onto one name generate numbered duplicates (Money, Money1)

  OpenAPITools/openapi-generator#25179 · Filter by author enfuce80 opened on Oct 8, 2026
  2

• [BUG][PYTHON] getPydanticType throws on OpenAPI 3.1 property with type "null" (7.26.0)

  OpenAPITools/openapi-generator#25176 · Filter by author dlynch90 opened on Oct 8, 2026
  1

• [BUG][typescript-fetch] Runtime fails isolatedDeclarations compilation

  OpenAPITools/openapi-generator#25172 · Filter by author budrobertson opened on Oct 7, 2026

• Spring generator uses one-based API page default as zero-based Pageable default

  OpenAPITools/openapi-generator#25160 · Filter by author Pattrigue opened on Oct 6, 2026
  2

• [BUG][csharp][generichost] Nested enum names collide in source-generated JSON contexts (SYSLIB1031)

  OpenAPITools/openapi-generator#25158 · Filter by author alexaka1 opened on Oct 6, 2026

• [BUG][csharp][generichost] anyOf with discriminator serializes to {}

  OpenAPITools/openapi-generator#25154 · Filter by author alexaka1 opened on Oct 6, 2026

• [REQ][Java] Remove unused imports from generated Java code

  OpenAPITools/openapi-generator#25145 · Filter by author ondrej-simon opened on Oct 6, 2026
  3

• [BUG][JAVA][Spring] Generated annotations contain attributes with default values (required = true, description = "")

  OpenAPITools/openapi-generator#25136 · Filter by author ondrej-simon opened on Oct 6, 2026

• [BUG][JAVA][jersey2/jersey3] multipart/form-data: object parts sent as toString() text instead of JSON, and encoding.contentType ignored

  Issue: Bug
  OpenAPITools/openapi-generator#25119 · Filter by author MatteoMolinari93 opened on Oct 5, 2026

• [Bug][Java/Spring] Container-level @Valid on Optional/JsonNullable-wrapped model properties triggers HV000271 (follow-up to #24176)

  OpenAPITools/openapi-generator#25097 · Filter by author jorgerod opened on Oct 2, 2026

• [REQ] Feature Request Description

  Enhancement: Feature
  OpenAPITools/openapi-generator#25094 · Filter by author alockmizan opened on Oct 2, 2026

• [REQ] /api-descriptions to return possible set of enums supported or other data type definitions to client rather than relying on previously agreed on spec

  Enhancement: Feature
  OpenAPITools/openapi-generator#25093 · Filter by author mohit0920 opened on Oct 2, 2026

• [REQ][Kotlin][jvm-spring-webclient] Support for useSpringBoot4 and useJackson3

  Enhancement: Feature
  OpenAPITools/openapi-generator#25078 · Filter by author KacperSzuba opened on Oct 1, 2026

• [BUG][PYTHON] 3.1 property with additionalProperties without type isn't deserialized

  Issue: Bug
  OpenAPITools/openapi-generator#25054 · Filter by author brettkail-wk opened on Sep 29, 2026

• [REQ][PHP] Bump guzzle version to 8

  Enhancement: Feature
  OpenAPITools/openapi-generator#25048 · Filter by author W0rma opened on Sep 29, 2026