GO-2026-5717 free5GC's NEF nnef-callback route group is unauthenticated; forged callback requests are accepted into the processing path in github.com/free5gc/nef

free5GC's NEF nnef-callback route group is unauthenticated; forged callback requests are accepted into the processing path in github.com/free5gc/nef...

PT-2026-39250

Name of the Vulnerable Software and Affected Versions free5GC versions prior to 4.2.2 Description The Network Exposure Function NEF in free5GC mounts the 'nnef-callback' route group without inbound OAuth2 or bearer-token authorization. This allows an attacker to reach the SMF-callback handler usi...