{"id":"CVE-2026-33192","aliases":["GHSA-5rvc-5cwx-g5x8","GO-2026-4755"],"url":"https://o3.security/vulnerability/CVE-2026-33192","summary":"free5GC UDM incorrectly returns 500 for empty supi path parameter in PATCH sdm-subscriptions reques","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 PATCH requests with an empty supi path parameter. Additionally, the UDM incorrectly translates the PATCH method to PUT when forwarding to UDR, indicating a deeper architectural issue. This leaks internal error handling behavior, making it difficult for clients to distinguish between client-side errors and server-side failures. The issue has been patched in version 1.4.2.","published":"2026-03-20T08:09:07.459Z","modified":"2026-07-31T18:31:12.032700371Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/free5gc/udm","fixedVersion":"1.4.2"}],"fix":{"url":"https://github.com/free5gc/udm/pull/79","label":"free5gc/udm#79"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33192.json"},{"type":"ADVISORY","url":"https://github.com/free5gc/free5gc/security/advisories/GHSA-5rvc-5cwx-g5x8"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33192"},{"type":"REPORT","url":"https://github.com/free5gc/free5gc/issues/784"},{"type":"FIX","url":"https://github.com/free5gc/udm/pull/79"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-07-31T18:31:12.032700371Z"}}