GHSA-RJ39-CV6W-8WV7 kin-openapi: YAML NaN/Inf Values Bypass Built-in Guards and Panic via OAS 3.1 Validation Path

Summary kin-openapi guards against NaN and Inf values in its built-in schema visitor visitJSON by returning ErrSchemaInputNaN / ErrSchemaInputInf when a float64 input violates those constraints. For OAS 3.1 specs, however, Schema.VisitJSON routes through useJSONSchema2020, which hands the value...

kin-openapi: ValidationHandler security-requirement bypass via encoded-path operation confusion

Summary openapi3filter.ValidationHandler.Middleware validates requests with kin-openapi's legacy router, which selects an OpenAPI operation from the decoded URL.Path. The method is documented as implementing gorilla/mux.MiddlewareFunc, but a downstream gorilla/mux router configured with...

GHSA-23VG-4CJM-66Q5 kin-openapi: ValidationHandler security-requirement bypass via encoded-path operation confusion

Summary openapi3filter.ValidationHandler.Middleware validates requests with kin-openapi's legacy router, which selects an OpenAPI operation from the decoded URL.Path. The method is documented as implementing gorilla/mux.MiddlewareFunc, but a downstream gorilla/mux router configured with...

Interpretation Conflict

Overview Affected versions of this package are vulnerable to Interpretation Conflict through the ValidationHandler.Middleware process when used with a downstream router that interprets encoded paths, such as gorilla/mux with UseEncodedPath. An attacker can access protected operations without...

Excessive Platform Resource Consumption within a Loop

Overview Affected versions of this package are vulnerable to Excessive Platform Resource Consumption within a Loop through repeated compilation of a loop-invariant regular expression inside the DecodeObject process. An attacker can exhaust CPU resources and degrade or deny service to legitimate...

GHSA-H4R5-MXV5-8MJC kin-openapi deepObject query decoding repeatedly compiles an invariant regular expression

Summary openapi3filter decodes deepObject-style query parameters by looping over every key in the request's query string. Inside that loop it recompiles a loop-invariant regular expression on every iteration. The pattern depends only on the spec-defined parameter name, not on the loop variable, s...

NULL Pointer Dereference

Overview Affected versions of this package are vulnerable to NULL Pointer Dereference through the resolveComponent process in the OpenAPI specification loader when handling a self-referential $ref in additionalProperties without proper nil-checks. An attacker can cause the application to crash by...

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...

Uncaught Exception

Overview Affected versions of this package are vulnerable to Uncaught Exception via the ValidationHandler process. An attacker can cause the application to panic and disrupt service availability by sending HTTP requests with non-canonical or unsupported HTTP method tokens to any existing static...

Uncaught Exception

Overview Affected versions of this package are vulnerable to Uncaught Exception via the ValidationHandler process. An attacker can cause the application to panic and disrupt service availability by sending HTTP requests with non-canonical or unsupported HTTP method tokens to any existing static...

Uncaught Exception

Overview Affected versions of this package are vulnerable to Uncaught Exception via the ValidationHandler process. An attacker can cause the application to panic and disrupt service availability by sending HTTP requests with non-canonical or unsupported HTTP method tokens to any existing static...

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...

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...

NULL Pointer Dereference

Overview Affected versions of this package are vulnerable to NULL Pointer Dereference in the openapi3filter process when handling OpenAPI 3.1 schemas that declare an array type without specifying items. An attacker can cause the application to crash by sending a crafted HTTP request with a...

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...