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...

Missing Authorization

Overview Affected versions of this package are vulnerable to Missing Authorization via the nnef-callback route group, which lacks inbound authentication and authorization checks. An attacker can access sensitive business logic and potentially manipulate subscription state by submitting forged...

GHSA-WQFH-GQ79-J8MF free5GC's NEF nnef-callback route group is unauthenticated; forged callback requests are accepted into the processing path

Summary free5GC's NEF mounts the nnef-callback route group without inbound OAuth2/bearer-token authorization. A forged or arbitrary bearer token e.g. Authorization: Bearer not-a-real-token is enough to reach the SMF-callback handler -- the callback body is parsed and dispatched into NEF business...

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...