CVE-2026-33065 (GCVE-0-2026-33065)

Vulnerability from cvelistv5 – Published: 2026-03-20 08:03 – Updated: 2026-03-20 12:49
VLAI?
Title
free5GC UDM incorrectly returns 500 for empty supi path parameter in DELETE sdm-subscriptions request
Summary
Free5GC is an open-source Linux Foundation project for 5th generation (5G) mobile core networks. In versions prior to 1.4.2, 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 internal error handling behavior and makes it difficult for clients to distinguish between client-side errors and server-side failures. When a client sends a DELETE request with an empty supi (e.g., double slashes // in URL path), the UDM forwards the malformed request to UDR, which correctly returns 400. However, UDM propagates this as 500 SYSTEM_FAILURE instead of returning the appropriate 400 error to the client. This violates REST API best practices for DELETE operations. The issue has been patched in version 1.4.2.
Severity ?
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N
CWE
  • CWE-209 - Generation of Error Message Containing Sensitive Information
Assigner
References
Impacted products
Vendor Product Version
free5gc free5gc Affected: < 1.4.2
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