CVE-2026-73502 - kin-openapi openapi3filter: unauthenticated nil-pointer panic when validating a request against a `content` parameter whose media type has no schema
Brief
CVE ID : CVE-2026-73502
Published : Aug. 18, 2026, 6:19 p. m.
- 48 minutes ago
Description : kin-openapi is a Go project for handling OpenAPI files. From 0.
- 0 until 0.
- 0, openapi3filter. ValidateRequest can encounter a NULL-pointer-dereference denial of service when an operation declares a content parameter whose application/json media type has no schema. In openapi3filter/req_resp_decoder. go, the default defaultContentParameterDecoder dereferences mt. Schema.
Value without checking whether mt. Schema is nil, even though doc. Validate() accepts the document under OpenAPI 3.
- x and 3.
- x. A single unauthenticated request supplying the parameter value can panic request validation, causing an aborted request with log growth in the common synchronous net/http path or a full process crash in integrations without recovery. This issue is fixed in version 0.
- 0.