CVE-2026-47856 JsonToObjectTransformer resolves the json__TypeId__ message header to an arbitrary class without an allow-list

Spring Integration's JSON to object conversion uses the jsonTypeId header to choose the deserialization target type, and resolves that header value to a class with ClassUtils.forName and no type/package allow-list. Spring Integration 7.1.0 Spring Integration 7.0.0 - 7.0.5 Spring Integration 6.5.0...