{"cve":"CVE-2026-33065","nvd":{"published":"2026-03-20T08:16:12.430","modified":"2026-06-17T10:36:53.457","status":"Analyzed","description":"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.","cvss_v4":{"vector":"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","score":6.9},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3},"cwes":["CWE-209"],"references":["https://github.com/free5gc/free5gc/issues/783","https://github.com/free5gc/free5gc/security/advisories/GHSA-958m-gxmc-mccm","https://github.com/free5gc/udm/commit/88de9fa74a1b3f3522e53b4cfa2d184712ffa4ee","https://github.com/free5gc/udm/pull/79"],"products":["free5gc:udm"],"source":"nvd","synced_at":"2026-10-19T22:26:19.218427112+00:00"},"epss":{"cve":"CVE-2026-33065","score":0.00287,"percentile":0.21334,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-958m-gxmc-mccm","url":"https://osv.dev/vulnerability/GHSA-958m-gxmc-mccm","summary":"free5GC UDM incorrectly returns 500 for empty supi path parameter in DELETE sdm-subscriptions request","modified":"2026-03-23T18:56:20.495758Z","packages":[{"ecosystem":"Go","name":"github.com/free5gc/udm","purl":"pkg:golang/github.com/free5gc/udm","ranges":["<1.4.2"],"fixed":["1.4.2"]}]},{"id":"GO-2026-4758","url":"https://osv.dev/vulnerability/GO-2026-4758","summary":"free5GC UDM incorrectly returns 500 for empty supi path parameter in DELETE sdm-subscriptions request in github.com/free5gc/udm","modified":"2026-03-23T18:45:15.133834Z","packages":[{"ecosystem":"Go","name":"github.com/free5gc/udm","purl":"pkg:golang/github.com/free5gc/udm","ranges":["<1.4.2"],"fixed":["1.4.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}