GHSA-MH7X-F8WQ-4JHX kin-openapi spec loader panics on a self-referential additionalProperties $ref (nil-pointer DoS)

The defect ---------- Confirmed at HEAD f0407d5, v0.144.0. openapi3/loader.go, inside resolveComponent's drill closure around line 455, the case SchemaRef branch for pathPart == "additionalProperties" dereferences c.Value.AdditionalProperties with no nil-check on c.Value: case SchemaRef: if...

kin-openapi spec loader panics on a self-referential additionalProperties $ref (nil-pointer DoS)

The defect ---------- Confirmed at HEAD f0407d5, v0.144.0. openapi3/loader.go, inside resolveComponent's drill closure around line 455, the case SchemaRef branch for pathPart == "additionalProperties" dereferences c.Value.AdditionalProperties with no nil-check on c.Value: case SchemaRef: if...

GHSA-FH4F-47MF-F2GJ kin-openapi: Unauthenticated panic (DoS) in openapi3filter legacy router via non-canonical/unsupported HTTP method on a static path

Summary The openapi3filter.ValidationHandler the exported, documented request-validation middleware hard-wires the legacy router routers/legacy. That router matches the incoming request method verbatim against a trie built exclusively from upper-cased canonical HTTP methods. A request carrying a...

kin-openapi: Unauthenticated panic (DoS) in openapi3filter legacy router via non-canonical/unsupported HTTP method on a static path

Summary The openapi3filter.ValidationHandler the exported, documented request-validation middleware hard-wires the legacy router routers/legacy. That router matches the incoming request method verbatim against a trie built exclusively from upper-cased canonical HTTP methods. A request carrying a...

GHSA-P6WJ-QRR4-PGH5 kin-openapi: Nil-pointer dereference panic in openapi3filter for OpenAPI 3.1 array schemas missing items

Summary A nil-pointer dereference in openapi3filter lets any unauthenticated client crash a request handler with a single HTTP request against an OpenAPI 3.1 operation that declares type: array without items. OpenAPI 3.1 JSON Schema 2020-12 permits omitting items, and doc.Validate accepts such...

kin-openapi: Nil-pointer dereference panic in openapi3filter for OpenAPI 3.1 array schemas missing items

Summary A nil-pointer dereference in openapi3filter lets any unauthenticated client crash a request handler with a single HTTP request against an OpenAPI 3.1 operation that declares type: array without items. OpenAPI 3.1 JSON Schema 2020-12 permits omitting items, and doc.Validate accepts such...

CVE-2026-100350

A flaw was found in kin-openapi. An unauthenticated remote attacker can trigger a Denial of Service DoS by sending requests containing a large number of query parameters to an affected endpoint. Due to redundant regular expression compilation within the parameter decoding loop, processing these...

CVE-2026-100347

A flaw was found in kin-openapi. An unauthenticated remote attacker can cause a Denial of Service DoS by sending requests with unsupported or non-canonical HTTP methods to an existing static path. Because the application encounters an unhandled panic before authentication is evaluated, these...

CVE-2026-100352

A flaw was found in kin-openapi. A remote, unauthenticated attacker can exploit this vulnerability by submitting a specially crafted YAML request containing non-finite numeric values, such as Not-a-Number or infinity, to an endpoint with numeric constraints. Because the validation process fails t...

CVE-2026-100351

A flaw was found in kin-openapi. An unauthenticated remote attacker can bypass authentication checks on protected routes by sending requests containing encoded path separators. This issue occurs because the request validation handler inspects the decoded URL path, while certain downstream routers...

CVE-2026-100349

A flaw was found in kin-openapi. This vulnerability allows an attacker to cause a Denial of Service DoS by triggering an application crash during response validation. When an OpenAPI specification declares a response header using content rather than a schema, the validation logic attempts to...

CVE-2026-100353

kin-openapi is a Go project for handling OpenAPI files. From 0.136.0 until 0.149.0, three openapi3filter decoder paths that were missed by the fix for GHSA-p6wj-qrr4-pgh5 lack a nil-items guard for legal OpenAPI 3.1 array schemas. An unauthenticated remote client can trigger a deterministic...

CVE-2026-100354

kin-openapi is a Go project for handling OpenAPI files. Prior to 0.149.0, runtime request, response, and direct schema validation lacks cycle detection when an allOf, anyOf, or oneOf chain refers back to an ancestor schema, even though loading and document validation accept the circular reference...

CVE-2026-97394

kin-openapi is a Go project for handling OpenAPI files. From 0.136.0 until 0.143.0, openapi3filter accepts OpenAPI 3.1 array schemas without an items keyword and then dereferences the nil Schema.Items value while decoding application/x-www-form-urlencoded or multipart/form-data request bodies,...

CVE-2026-100351

kin-openapi is a Go project for handling OpenAPI files. From 0.144.0 until 0.147.0, openapi3filter.ValidationHandler validates an operation selected from decoded URL.Path while a downstream gorilla/mux router configured with UseEncodedPath can dispatch a different operation selected from...

CVE-2026-100350

kin-openapi is a Go project for handling OpenAPI files. From 0.145.0 until 0.146.0, openapi3filter repeatedly calls regexp.MustCompile for the same parameter-name regular expression inside the per-query-key loop in urlValuesDecoder.DecodeObject used to decode a deepObject query parameter. An...

CVE-2026-100347

kin-openapi is a Go project for handling OpenAPI files. Prior to 0.145.0, openapi3filter.ValidationHandler uses the routers/legacy router, which passes an unsupported or non-canonical HTTP method for an existing static path to openapi3.PathItem.GetOperation. The default branch of GetOperation...

CVE-2026-100349

kin-openapi is a Go project for handling OpenAPI files. Prior to 0.146.0, openapi3filter.ValidateResponse passes a nil response header schema to decodeValue when an OpenAPI document declares the header with content instead of schema. The document passes validation, but every response validation f...

CVE-2026-100353 kin-openapi: Incomplete Fix for GHSA-p6wj-qrr4-pgh5: Three Unpatched nil-Items Panic Paths in openapi3filter

kin-openapi is a Go project for handling OpenAPI files. From 0.136.0 until 0.149.0, three openapi3filter decoder paths that were missed by the fix for GHSA-p6wj-qrr4-pgh5 lack a nil-items guard for legal OpenAPI 3.1 array schemas. An unauthenticated remote client can trigger a deterministic...

CVE-2026-100353 kin-openapi: Incomplete Fix for GHSA-p6wj-qrr4-pgh5: Three Unpatched nil-Items Panic Paths in openapi3filter

kin-openapi is a Go project for handling OpenAPI files. From 0.136.0 until 0.149.0, three openapi3filter decoder paths that were missed by the fix for GHSA-p6wj-qrr4-pgh5 lack a nil-items guard for legal OpenAPI 3.1 array schemas. An unauthenticated remote client can trigger a deterministic...