free5GC UDM incorrectly returns 500 for empty supi path parameter in DELETE sdm-subscriptions request

Impact This is an Improper Error Handling vulnerability with Information Exposure implications. - Security Impact: The UDM incorrectly converts a downstream 400 Bad Request from UDR into a 500 Internal Server Error when handling DELETE requests with an empty supi path parameter. This leaks intern...

PT-2026-26209

Name of the Vulnerable Software and Affected Versions Free5GC versions prior to 1.4.2 Description Free5GC’s UDM component exhibits improper error handling and HTTP method translation issues. Specifically, when handling PATCH requests to the /sdm-subscriptions endpoint with an empty supi path...