Advisories for Golang/Github.com/Getkin/Kin-Openapi package

A nil-pointer dereference in openapi3filter.ConvertErrors lets any unauthenticated client crash a server with a single HTTP request. When an application validates a multipart/form-data request body and renders the resulting validation error through the library-provided ValidationErrorEncoder / ConvertErrors helpers, a malformed scalar form field (e.g. a non-numeric value for an integer property) produces an error shape that convertParseError dereferences without a nil check. The handler goroutine panics, causing a denial of …

An uncontrolled resource consumption vulnerability in openapi3filter lets any unauthenticated client force multi-gigabyte heap allocation with a single, tiny HTTP request. When a spec declares a deepObject-style query parameter whose schema contains an array (a normal, documented pattern), the decoder reconstructs the array by reading the largest attacker-supplied index and allocating one slot for every position from 0 up to that index — before schema validation (including maxItems) ever runs. …

ValidationHandler.Load() in getkin/kin-openapi silently replaces a nil AuthenticationFunc with NoopAuthenticationFunc, which always returns nil without performing any credential check. Because this substitution happens unconditionally when the caller omits the field, every OpenAPI security requirement declared in the spec is silently satisfied for unauthenticated requests. An unauthenticated remote attacker can reach handlers for routes whose OpenAPI operation requires an API key, OAuth token, or any other security scheme if the application …

openapi3filter.ValidateRequest contains a NULL-pointer-dereference denial of service: any unauthenticated client can crash the request-validation path with a single HTTP request. When an operation declares a content parameter (as opposed to a schema parameter) whose media type object has no schema, request validation dereferences that missing schema and panics. The document is legal under the OpenAPI Specification — kin-openapi's own doc.Validate() accepts it — and the defect affects both OpenAPI 3.0.x …

When validating a request with a multipart/form-data schema, if the OpenAPI schema allows it, an attacker can upload a crafted ZIP file (e.g., a ZIP bomb), causing the server to consume all available system memory.

When validating a request with a multipart/form-data schema, if the OpenAPI schema allows it, an attacker can upload a crafted ZIP file (e.g., a ZIP bomb), causing the server to consume all available system memory.