{"schema_version":"1.9.0","id":"CVE-2026-33065","published":"2026-03-20T08:03:39.357Z","modified":"2026-08-12T03:51:41.676363969Z","aliases":["GHSA-958m-gxmc-mccm","GO-2026-4758"],"related":["SUSE-SU-2026:1135-1","openSUSE-SU-2026:21483-1"],"summary":"free5GC UDM incorrectly returns 500 for empty supi path parameter in DELETE sdm-subscriptions request","details":"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.","affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/free5gc/udm","events":[{"introduced":"0"},{"fixed":"65d7070f4bfd016864cbbaefbd506bbc85d2fa92"},{"fixed":"88de9fa74a1b3f3522e53b4cfa2d184712ffa4ee"}],"database_specific":{"cpe":"cpe:2.3:a:free5gc:udm:*:*:*:*:*:go:*:*","extracted_events":[{"introduced":"0"},{"fixed":"1.4.2"}],"source":["CPE_RANGE","REFERENCES"]}}],"versions":["v1.4.1","v1.4.0","v1.3.2","v1.3.1","v1.3.0","v1.2.5","v1.2.4","v1.2.3","v1.2.2","v1.2.1","v1.2.0","v1.1.1","v1.1.0","v1.0.2","v1.0.1","v1.0.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-33065.json"}}],"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33065.json"},{"type":"ADVISORY","url":"https://github.com/free5gc/free5gc/security/advisories/GHSA-958m-gxmc-mccm"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33065"},{"type":"REPORT","url":"https://github.com/free5gc/free5gc/issues/783"},{"type":"FIX","url":"https://github.com/free5gc/udm/commit/88de9fa74a1b3f3522e53b4cfa2d184712ffa4ee"},{"type":"FIX","url":"https://github.com/free5gc/udm/pull/79"}],"database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-209"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33065.json"},"severity":[{"type":"CVSS_V4","score":"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"}]}