Issues

• [REQ/PROPOSAL/OFFER TO IMPLEMENT] - Native OpenAPI Overlay Support

  Enhancement: Feature
  OpenAPITools/openapi-generator#25661 · Filter by author Picazsoo opened on Nov 13, 2026

• [BUG][Java] Nested <OperationId>Request class collides with request body model, breaking existing methods

  Issue: Bug
  OpenAPITools/openapi-generator#25646 · Filter by author kellyfj opened on Nov 12, 2026
  3

• [BUG][typescript-fetch] runtime.ts does not compile with noUncheckedIndexedAccess since 7.26.0 (TS2345/TS2532)

  Issue: Bug
  OpenAPITools/openapi-generator#25643 · Filter by author max-te opened on Nov 12, 2026
  1

• [BUG][JAVA][SPRING] instantiationTypes ignored in add…Item/put…Item helpers since 7.26.0, models no longer compile with custom typeMappings

  Issue: Bug
  OpenAPITools/openapi-generator#25642 · Filter by author max-te opened on Nov 12, 2026
  1

• [BUG][CSHARP][generichost] Many-to-one discriminator mapping emits duplicate local variables (CS0128)

  OpenAPITools/openapi-generator#25640 · Filter by author eikooc opened on Nov 12, 2026

• [BUG][typescript-axios] Primitive anyOf validation becomes an empty nullable model

  OpenAPITools/openapi-generator#25637 · Filter by author Justineo opened on Nov 12, 2026

• [BUG][typescript-axios] oneOf models drop sibling properties

  OpenAPITools/openapi-generator#25635 · Filter by author Justineo opened on Nov 12, 2026
  1

• [Announcement] Kotlin 1.x reached end-of-life

  Announcement
  OpenAPITools/openapi-generator#25631 · Filter by author wing328 opened on Nov 11, 2026

• [BUG][Go] JSON content headers contain non-ASCII characters and DEL

  OpenAPITools/openapi-generator#25618 · Filter by author AndreyVMarkelov opened on Nov 11, 2026

• [BUG][RUST] RustClientCodegen does not check RUST_POST_PROCESS_FILE or run rustfmt

  Issue: Bug
  OpenAPITools/openapi-generator#25612 · Filter by author AnthemZach opened on Nov 10, 2026

• [BUG][3.1] "Failed to get the schema name: null" for a schema with additionalProperties: false that has an additionalProperties: true property

  OpenAPITools/openapi-generator#25604 · Filter by author randyhbh opened on Nov 10, 2026

• [BUG][typescript-axios] 7.27.0 generated package fails to build: TypeScript 6 resolved but @types/node not loaded

  OpenAPITools/openapi-generator#25598 · Filter by author atl3tico opened on Nov 9, 2026

• [BUG][KOTLIN] kotlinx_serialization: a string-or-number anyOf/oneOf with number mapped to kotlin.Long/kotlin.Double still doesn't compile in 7.27.0

  OpenAPITools/openapi-generator#25587 · Filter by author ceolinwill opened on Nov 7, 2026

• // Check with default settings const paymentMethods = await sdkInstance.findEligibleMethods(); // Check with specific currency and amount const paymentMethods = await sdkInstance.findEligibleMethods({ currencyCode: "USD", countryCode: "US", amount: "125.00", }); // Use the eligibility results if (paymentMethods.isEligible("paypal")) { // Show PayPal button } if (paymentMethods.isEligible("paylater")) { const details = paymentMethods.getDetails("paylater"); // Show Pay Later button with product-specific messaging }

  OpenAPITools/openapi-generator#25584 · Filter by author KNAutoservice-gif opened on Nov 7, 2026
  1

• [BUG][KOTLIN] Dependencies whose types are in the client's public API are declared as implementation

  OpenAPITools/openapi-generator#25576 · Filter by author Grinv opened on Nov 6, 2026

• [BUG][CSHARP] generichost: every Api class requires TokenProvider<ApiKeyToken> when an apiKey scheme is only declared

  OpenAPITools/openapi-generator#25575 · Filter by author Grinv opened on Nov 6, 2026

• [BUG][PHP] Nullable model reference in an array or map loses its namespace separators

  OpenAPITools/openapi-generator#25574 · Filter by author Grinv opened on Nov 6, 2026

• [BUG][KOTLIN] build.gradle generated with idea=true fails on Gradle 9 (testSourceDirs)

  OpenAPITools/openapi-generator#25572 · Filter by author Grinv opened on Nov 6, 2026

• [BUG][JAVA] Deprecated properties only get @Deprecated on the getter (base, feign, native, microprofile)

  Issue: Bug
  OpenAPITools/openapi-generator#25567 · Filter by author KorbinianMartini opened on Nov 5, 2026

• [BUG][typescript-nestjs] Generated client fails with TS2307 on NestJS 12 (import from @nestjs/common/interfaces)

  OpenAPITools/openapi-generator#25564 · Filter by author reichhartd opened on Nov 5, 2026

• Mollie

  OpenAPITools/openapi-generator#25551 · Filter by author KNAutoservice-gif opened on Nov 3, 2026

• [BUG] Issue with options

  Issue: Bug
  OpenAPITools/openapi-generator#25550 · Filter by author KNAutoservice-gif opened on Nov 3, 2026
  1

• [BUG][C#] Generic host loses object oneOf values during serialization

  OpenAPITools/openapi-generator#25547 · Filter by author AndreyVMarkelov opened on Nov 3, 2026

• [BUG][JAVA] Generated code still missing many @Nullable annotations

  Issue: Bug
  OpenAPITools/openapi-generator#25536 · Filter by author OrangeDog opened on Nov 3, 2026

• [BUG][Java][okhttp-gson] JSON.java fails to compile with many model adapters

  OpenAPITools/openapi-generator#25532 · Filter by author AndreyVMarkelov opened on Nov 3, 2026