free5GC AMF provides Access & Mobility Management Function (AMF) for free5GC, an an open-source project for 5th generation (5G) mobile core networks. Prior to version 1.4.3, the "HTTPUEContextTransfer" handler in "internal/sbi/api_communication.go" does not include a "default" case in the "Content-Type" switch statement. When a request arrives with an unsupported "Content-Type", the deserialization step is silently skipped, "err" remains "nil", and the processor is invoked with a completely uninitialized "UeContextTransferRequest" object. Version 1.4.3 contains a fix.