Issues

• [BUG][PHP][Symfony] Not compatible with Symfony 8

  Issue: Bug
  OpenAPITools/openapi-generator#25107 · Filter by author gturri opened on Oct 2, 2026

• [BUG][csharp] not: enum constraints are ignored (open-enum oneOf unions mis-discriminate)

  OpenAPITools/openapi-generator#25102 · Filter by author cguldner opened on Oct 2, 2026

• [Bug][Java/Spring] Container-level @Valid on Optional/JsonNullable-wrapped models still 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

• [BUG][typescript-fetch] not: enum constraints are ignored by generated type guards

  OpenAPITools/openapi-generator#25092 · Filter by author AndreyVMarkelov opened on Oct 1, 2026

• [BUG][Go] String enum constraints are not enforced during JSON unmarshaling

  OpenAPITools/openapi-generator#25090 · Filter by author AndreyVMarkelov opened on Oct 1, 2026

• [BUG][TypeScript] JSON-content header parameter is not serialized as JSON

  OpenAPITools/openapi-generator#25086 · Filter by author AndreyVMarkelov opened on Oct 1, 2026

• [BUG][Go] JSON-content header parameter is expanded into bracketed headers instead of JSON

  OpenAPITools/openapi-generator#25084 · Filter by author AndreyVMarkelov opened on Oct 1, 2026

• [BUG][csharp] Header parameter with content: application/json is serialized via ParameterToString() instead of JSON

  OpenAPITools/openapi-generator#25082 · Filter by author cguldner opened on Oct 1, 2026

• [BUG][csharp] httpclient: oneOf/anyOf responses throw ArgumentException because FromJson is invoked with HttpContent

  Issue: Bug
  OpenAPITools/openapi-generator#25079 · Filter by author cguldner opened on Oct 1, 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

• [REQ][JAVA][rest-assured] Support useJackson3

  OpenAPITools/openapi-generator#25076 · Filter by author austek opened on Oct 1, 2026

• [BUG][Python] not with enum is ignored during model validation

  Issue: Bug
  OpenAPITools/openapi-generator#25069 · Filter by author AndreyVMarkelov opened on Sep 30, 2026

• [BUG][Python] Header parameter with content: application/json is not JSON serialized

  Issue: Bug
  OpenAPITools/openapi-generator#25067 · Filter by author AndreyVMarkelov opened on Sep 30, 2026

• [Java][okhttp-gson] oneOf with not: enum does not exclude matching string enum values

  OpenAPITools/openapi-generator#25065 · Filter by author AndreyVMarkelov opened on Sep 30, 2026

• [BUG][Java][okhttp-gson] Header parameter with content: application/json is serialized via toString()

  Issue: Bug
  OpenAPITools/openapi-generator#25055 · Filter by author AndreyVMarkelov opened on Sep 30, 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

• Python: make_instance generates syntax error for optional nullable fields with default null in nested objects

  OpenAPITools/openapi-generator#25047 · Filter by author sieira opened on Sep 29, 2026
  3

• [BUG] Description

  Issue: Bug
  OpenAPITools/openapi-generator#25031 · Filter by author kadamar opened on Sep 28, 2026

• [BUG] Description from unrelated query parameter assigned to field in schema

  Issue: Bug
  OpenAPITools/openapi-generator#25030 · Filter by author jg50hz opened on Sep 28, 2026

• [BUG][Rust] reqwest client does not compile for required nullable params, free-form object query params, inline object form fields and a param named configuration

  OpenAPITools/openapi-generator#25020 · Filter by author HardMax71 opened on Sep 26, 2026

• [REQ] Feature Request Description

  Enhancement: Feature
  OpenAPITools/openapi-generator#25006 · Filter by author morrta opened on Sep 24, 2026
  2

• [BUG][RUBY-NEXTGEN] Nested resources are not reachable from the client

  OpenAPITools/openapi-generator#24999 · Filter by author wiebren opened on Sep 23, 2026