Bump Microsoft.OpenApi from 2.0.0 to 3.5.0

[dependabot]

Updated Microsoft.OpenApi from 2.0.0 to 3.5.0.

Release notes

Sourced from Microsoft.OpenApi's releases.

3.5.0

3.5.0 (2026-03-20)

Features

• library: add Extensions support for schema references in v3.1/v3.2; add SerializeAsV32 with loop detection (9b422bf)

Bug Fixes

• a bug where path parameter validation would fail if they contained forbidden JSON pointer characters (ef55b2c)
• a bug where path parameter validation would fail if they contained forbidden JSON pointer characters (4b3164a)
• double encoding of json pointer for invalid reference rule (b246cd0)
• encoding of special characters for JSON paths (4c757e1)
• library: do not emit unevaluatedProperties for non-object schemas (852fb4c)
• library: do not emit unevaluatedProperties for non-object schemas (19538aa)
• library: enforce spec-compliant $ref serialization; add Extensions support for schema references in v3.1/v3.2 (9bf61de)
• potential double encoding of paths (471a61a)

3.4.0

3.4.0 (2026-03-04)

Features

• library: preserve PatternProperties as x-jsonschema-patternProperties extension for OpenAPI v2/v3.0 serialization (d969fdc)
• library: Preserve PatternProperties via x-jsonschema-patternProperties extension for OpenAPI v2/v3.0 (16ab5e4)
• securityscheme: add oauth2MetadataUrl support (OpenAPI 3.2) (4509488)

Bug Fixes

• implement unevaluatedProperties as schema per JSON Schema 2020-12 (#​2728) (7c13fb3)
• library: serialize additionalProperties schema in OpenAPI V2 (f3165fa)
• library: serialize additionalProperties schema in OpenAPI V2 documents (3d07756)
• optimize parsing V3.1 documents by reducing GetLocation method allocation on hot path(#​2748) (f690681)

3.3.1

3.3.1 (2026-01-22)

Features

• models: add shared Content interface (#​2695) (338566f)

Bug Fixes

• broken binary compatibility due to interface changes in previous version (d96bba7)

3.3.0

3.3.0 (2026-01-21)

Features

• models: add shared Content interface (9e13b25)
• models: add shared Content interface (#​2695) (9e13b25)
• models: support mutualTLS security scheme (a4efdfe)

3.2.0

3.2.0 (2026-01-19)

Features

• hidi validate command now logs warnings (76a3c0f)
• hidi validate command now logs warnings (62e7d56)

Bug Fixes

• discriminator property validation fails any/allOf cases when it shouldn't (fb6cecc)
• discriminator property validation fails any/allOf cases when it shouldn't (a8fb81c)

3.1.3

3.1.3 (2026-01-16)

Bug Fixes

• Support custom tag ordering (008576c)
• Support custom tag ordering (7610d07)

3.1.2

3.1.2 (2026-01-06)

Bug Fixes

• correct error pointer when extension parser throws OpenApiException (43c75a9)
• wrap extension parser calls in try-catch to ensure correct error pointers (50b44aa)

3.1.1

3.1.1 (2025-12-18)

Bug Fixes

• schema: always serialize additionalProperties: false (6651c36)
• schema: always serialize additionalProperties: false (e36fc95)

3.1.0

3.1.0 (2025-12-17)

Features

• Add type: "null" downcasting when in oneOf and anyOf for OpenAPI v3 (782cf8d)

3.0.3

3.0.3 (2025-12-16)

Bug Fixes

• load JSON documents that are preceded by multiple whitespace (6461bac)
• non-seekable json streams would fail to load as a document (2436d73)
• reading streams in an asp.net context would cause async exceptions (f9e5248)

3.0.2

3.0.2 (2025-12-08)

Bug Fixes

• additional properties serialization should not emit a schema in v2 (946cba9)
• additional properties serialization should not emit booleans in v3.1+ (946cba9)

3.0.1

3.0.1 (2025-11-17)

Bug Fixes

• empty strings should be quoted in yaml (8d215f9)
• empty strings should be quoted in yaml (0ca10db)

3.0.0

3.0.0 (2025-11-11)

⚠ BREAKING CHANGES

• adds support for OpenAPI 3.2.0

Note: Please refer to the upgrade guide for a detailed description of the breaking changes.

Note: ASP.net users should remain on version 1.X for ASP.net < 10, and version 2.X for ASP.net 10, this new major version will be implemented in a future version of ASP.net, more information

Features

• adds support for OpenAPI 3.2.0 (765a8dd)

Special thanks

• Matthieu Costabello

2.7.1

2.7.1 (2026-03-20)

Bug Fixes

• a bug where path parameter validation would fail if they contained forbidden JSON pointer characters (2efd2b2)
• library: do not emit unevaluatedProperties for non-object schemas (28d614f)
• library: enforce spec-compliant $ref serialization; add Extensions support for schema references in v3.1/v3.2 (7640a8a)

2.7.0

2.7.0 (2026-03-05)

Features

• add UnevaluatedPropertiesSchema support to IOpenApiSchema (fb691d6)
• library: preserve PatternProperties as x-jsonschema-patternProperties extension for OpenAPI v2/v3.0 serialization (dd5085a)

Bug Fixes

• address PR feedback on UnevaluatedProperties implementation (80fc0f6)
• correct deserialization and test for UnevaluatedPropertiesSchema (a4d66fc)
• library: serialize additionalProperties schema in OpenAPI V2 (99b653c)
• library: serialize additionalProperties schema in OpenAPI V2 (cef7996)
• optimize parsing V3.1 documents by reducing GetLocation method allocation on hot path(#​2748) (91e697b)
• optimize parsing V3.1 documents by reducing GetLocation method allocation on hot path(#​2748) (06c58a5)

2.6.1

2.6.1 (2026-01-22)

Bug Fixes

• broken binary compatibility due to interface changes in previous version (06f2b85)

2.6.0

2.6.0 (2026-01-21)

Features

• models: add shared Content interface (80e4bbf)
• models: add shared Content interface (#​2695) (338566f)
• models: add shared Content interface (#​2695) (80e4bbf)
• models: support mutualTLS security scheme (f9cf5b8)

2.5.0

2.5.0 (2026-01-19)

Features

• hidi validate command now logs warnings (1d3d085)
• hidi validate command now logs warnings (18ed5ac)

Bug Fixes

• discriminator property validation fails any/allOf cases when it shouldn't (ff6e411)
• discriminator property validation fails any/allOf cases when it shouldn't (7def73d)

2.4.3

2.4.3 (2026-01-16)

Bug Fixes

• Support custom tag ordering (008576c)
• Support custom tag ordering (7610d07)

2.4.2

2.4.2 (2025-12-22)

Bug Fixes

• wrap extension parser calls in try-catch to ensure correct error pointers (63cf4a3)
• wrap extension parser calls in try-catch to ensure correct error pointers (458cabe)

2.4.1

2.4.1 (2025-12-18)

Bug Fixes

• schema: always serialize additionalProperties: false (6651c36)
• schema: always serialize additionalProperties: false (e36fc95)

2.4.0

2.4.0 (2025-12-17)

Features

• Add type: "null" downcasting when in oneOf and anyOf for OpenAPI v3 (782cf8d)

2.3.12

2.3.12 (2025-12-15)

Bug Fixes

• load JSON documents that are preceded by multiple whitespace (640e59a)
• non-seekable json streams would fail to load as a document (76b0159)
• non-seekable json streams would fail to load as a document (2436d73)
• reading streams in an asp.net context would cause async exceptions (f9e5248)

2.3.11

2.3.11 (2025-12-08)

Bug Fixes

• additional properties serialization should not emit a schema in v2 (946cba9)
• additional properties serialization should not emit a schema in v2 fix: additional properties serialization should not emit booleans in v3.1+ (275dd9d)
• additional properties serialization should not emit booleans in v3.1+ (946cba9)

2.3.10

2.3.10 (2025-11-17)

Bug Fixes

• empty strings should be quoted in yaml (e919b33)
• empty strings should be quoted in yaml (0ca10db)

2.3.9

2.3.9 (2025-11-06)

Bug Fixes

• a bug where null sentinel value would appear in YAML documents (15618e1)

2.3.8

2.3.8 (2025-10-27)

Bug Fixes

• an issue where numeric property names would be missing quotes in yaml conversion (da43c98)
• quote property names in yaml that match boolean values (39a9f41)
• yaml blocks and line returns (b053848)

2.3.7

2.3.7 (2025-10-24)

Bug Fixes

• adds a null value sentinel to enable roundtrip serializations of JsonNode typed properties (337c6eb)
• adds a null value sentinel to enable roundtrip serializations of JsonNode typed properties (63b2b98)
• fixes a bug where yaml null values would end up as a string "null" during roundtrip serialization (6e62de2)
• fixes a bug where yaml null values would end up as a string "null" during roundtrip serialization (994184b)
• YamlConverter adding extra quotes to string values when converting from JSON to YAML (ccfebc8)

Performance Improvements

• do not duplicate nodes when indexing (dbbbf13)
• only initialize map node nodes on demand (bdb5264)
• reduce allocations in mapnode (f58aad2)
• removes the lazy initialization since the node is always enumerated (1c96521)
• switches to lazy instantiation (d3c758b)
• use deep equals for comparison to reduce allocations (6ce3214)

2.3.6

2.3.6 (2025-10-20)

Bug Fixes

• a bug where empty collections would not be serialized for default values (4c4d257)

2.3.5

2.3.5 (2025-10-14)

Bug Fixes

• use settings for terse output in serialization extension methods (246039b)
• use settings for terse output in serialization extension methods (8b91278)

2.3.4

2.3.4 (2025-10-06)

Bug Fixes

• Improve server creation and URL handling logic to maintain port (3e6ee80)
• missing deserialization for header content property in 3.1 and 3.0 (717f154)
• missing deserialization for header content property in 3.1 and 3.0 (0fdfae1)

2.3.3

2.3.3 (2025-10-02)

Bug Fixes

• typo in allowReserved property name for deserialization (1633453)
• typo in allowReserved property name for deserialization (f7e34be)

2.3.2

2.3.2 (2025-09-19)

Bug Fixes

• Fix URL processing in InternalLoad method would not detect the filename/scheme properly in some scenarios (d93689c)
• OpenApiEncoding explode property serialization defaults with form style (ae03eab)

2.3.1

2.3.1 (2025-09-08)

Bug Fixes

• file access for "file" URI scheme with special characters (6dded81)

2.3.0

2.3.0 (2025-08-29)

Features

• adds the detected format as part of the diagnostic (#​2482) (59d7c81)
• adds the detected format to the diagnostics (59d7c81)

2.2.0

2.2.0 (2025-08-25)

Features

• add Validation Rule for path operations to not have a request body (d101fc3)

Bug Fixes

• missing examples when one example is with an empty array. (cb1c496)

2.1.0

2.1.0 (2025-08-20)

Features

• adds a default validation rule for unresolved references (90b3966)

Bug Fixes

• Improve OpenApiWalker performance (a007c03)
• Validate schema property is not null (3326022)

2.0.1

2.0.1 (2025-08-18)

Bug Fixes

• add missing disposable for stream (0c1ccbd)

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