Issues

• [REQ][JAVA][resteasy] Support for Jackson 3 / useJackson3

  Enhancement: Feature
  OpenAPITools/openapi-generator#25364 · Filter by author blaghed opened on Oct 22, 2026

• [REQ][jaxrs-spec] Support for Jackson 3 / useJackson3

  Enhancement: Feature
  OpenAPITools/openapi-generator#25363 · Filter by author blaghed opened on Oct 22, 2026

• [BUG] CVE-2026-110879

  Issue: Bug
  OpenAPITools/openapi-generator#25358 · Filter by author maarre opened on Oct 22, 2026
  1

• [BUG][PHP][PHP-NEXTGEN] allOf-wrapped array items and parameters lose the model namespace

  OpenAPITools/openapi-generator#25354 · Filter by author yarwoob opened on Oct 21, 2026

• [REQ][PYTHON] Modernize Python version support in python-pydantic-v1 generator

  Enhancement: Feature
  OpenAPITools/openapi-generator#25349 · Filter by author Bernardoow opened on Oct 21, 2026

• [BUG][KOTLIN-SPRING] @field:Valid on container properties triggers HV000271/HV000272 warnings (Hibernate Validator 9.1)

  Issue: Bug
  OpenAPITools/openapi-generator#25347 · Filter by author vklidu opened on Oct 21, 2026

• [Python] Add native lazy import support for Python 3.15

  Enhancement: Feature
  OpenAPITools/openapi-generator#25318 · Filter by author Bernardoow opened on Oct 19, 2026

• [REQ][dart-dio] Support useOptional / patchOnly with serializationLibrary=freezed

  Enhancement: Feature
  OpenAPITools/openapi-generator#25310 · Filter by author ArunChapagain opened on Oct 19, 2026
  2

• [BUG][RUST] chrono date-time path/query/header params are not serialized as RFC 3339

  OpenAPITools/openapi-generator#25297 · Filter by author teovillanueva opened on Oct 17, 2026

• [BUG][rust-axum] Recursive models generate infinitely sized types (E0072)

  OpenAPITools/openapi-generator#25295 · Filter by author teovillanueva opened on Oct 17, 2026

• [BUG][rust-axum] Range response codes (4XX, 5XX) generate code that does not compile

  OpenAPITools/openapi-generator#25293 · Filter by author teovillanueva opened on Oct 17, 2026

• [BUG][RUST] enumUnknownDefaultCase does not make unknown enum values deserialize

  OpenAPITools/openapi-generator#25291 · Filter by author teovillanueva opened on Oct 17, 2026

• [BUG][core] SIMPLIFY_ANYOF_STRING_AND_ENUM_STRING has no effect on OpenAPI 3.1 specs

  OpenAPITools/openapi-generator#25289 · Filter by author teovillanueva opened on Oct 17, 2026

• [BUG][openapi-normalizer] SIMPLIFY_BOOLEAN_ENUM has no effect on OpenAPI 3.1 specs

  OpenAPITools/openapi-generator#25287 · Filter by author teovillanueva opened on Oct 17, 2026

• [BUG][RUST] reqwest client picks the wrong error/success variant when several responses share a schema

  OpenAPITools/openapi-generator#25285 · Filter by author teovillanueva opened on Oct 17, 2026

• [BUG][rust-axum] default responses are sent with status 0: handler panics or returns 500

  OpenAPITools/openapi-generator#25283 · Filter by author teovillanueva opened on Oct 17, 2026

• > <!-- See [CONTRIBUTING.md](../CONTRIBUTING.md#proposing-a-design) for more information.-->

  OpenAPITools/openapi-generator#25278 · Filter by author rafaelmejiaaguilar691-sudo opened on Oct 16, 2026

• [BUG][typescript-fetch] Nested oneOf: parent imports instanceOf<Member> that is never emitted (TS2724/TS2305)

  OpenAPITools/openapi-generator#25274 · Filter by author daniele-casciani opened on Oct 16, 2026
  1

• [BUG][Go] Testify dependency is omitted unless spec requires OAuth2

  Issue: Bug
  OpenAPITools/openapi-generator#25270 · Filter by author carmanchris31 opened on Oct 15, 2026
  2

• [BUG][csharp][generichost] Serializing a model with an unset optional inline string enum throws "Nullable object must have a value"

  Issue: Bug
  OpenAPITools/openapi-generator#25267 · Filter by author mgeri opened on Oct 15, 2026

• [REQ][Java][Client][MicroProfile] Add an option to omit @RegisterRestClient during client generation

  Enhancement: Feature
  OpenAPITools/openapi-generator#25264 · Filter by author icirloprivate opened on Oct 15, 2026
  1

• [BUG][rust-server] serde_valid validation stops at generated model wrappers

  OpenAPITools/openapi-generator#25261 · Filter by author EricLiu2000 opened on Oct 15, 2026

• [BUG][RUST] Reqwest - encoding of spaces in path parameters

  Issue: Bug
  OpenAPITools/openapi-generator#25257 · Filter by author GlenWright opened on Oct 14, 2026
  3

• [BUG][rust-axum] additionalProperties: false does not reject unknown JSON fields

  OpenAPITools/openapi-generator#25255 · Filter by author lucarlig opened on Oct 14, 2026

• [BUG][JAVA][SPRING] HV000271 still logged for non-required @RequestBody Optional<Dto> (7.26.0)

  OpenAPITools/openapi-generator#25249 · Filter by author rfsimoes opened on Oct 13, 2026
  1