chore: Bump Microsoft.OpenApi from 2.6.1 to 3.5.0

[dependabot]

Updated Microsoft.OpenApi from 2.6.1 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)

Commits viewable in compare view.

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

---

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

• @dependabot rebase will rebase this PR
• @dependabot recreate will recreate this PR, overwriting any edits that have been made to it
• @dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
• @dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
• @dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

[dependabot]

Labels

The following labels could not be found: automated, dependencies, nuget. Please create them before Dependabot can add them to a pull request.

Please fix the above issues or remove invalid values from dependabot.yml.