{"cve":"CVE-2026-33064","nvd":{"published":"2026-03-20T08:16:12.257","modified":"2026-06-17T10:36:53.333","status":"Analyzed","description":"Free5GC is an open-source Linux Foundation project for 5th generation (5G) mobile core networks. Versions prior to 1.4.2 are vulnerable to procedure panic caused by Nil Pointer Dereference in the /sdm-subscriptions endpoint. A remote attacker can cause the UDM service to panic and crash by sending a crafted POST request to the /sdm-subscriptions endpoint with a malformed URL path containing path traversal sequences (../) and a large JSON payload. The DataChangeNotificationProcedure function in notifier.go attempts to access a nil pointer without proper validation, causing a complete service crash with \"runtime error: invalid memory address or nil pointer dereference\". Exploitation would result in UDM functionality disruption until recovery by restart. This issue has been fixed in version 1.4.2.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.7},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5},"cwes":["CWE-476","CWE-478"],"references":["https://github.com/free5gc/free5gc/issues/781","https://github.com/free5gc/free5gc/security/advisories/GHSA-7g27-v5wj-jr75","https://github.com/free5gc/udm/commit/65d7070f4bfd016864cbbaefbd506bbc85d2fa92","https://github.com/free5gc/udm/pull/78"],"products":["free5gc:udm"],"source":"nvd","synced_at":"2026-10-19T22:26:19.218427112+00:00"},"epss":{"cve":"CVE-2026-33064","score":0.00495,"percentile":0.42469,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-7g27-v5wj-jr75","url":"https://osv.dev/vulnerability/GHSA-7g27-v5wj-jr75","summary":"free5GC UDM DataChangeNotification Procedure Panic Due to Nil Pointer Dereference","modified":"2026-03-23T18:55:59.268001Z","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-2026-4757","url":"https://osv.dev/vulnerability/GO-2026-4757","summary":"free5GC UDM DataChangeNotification Procedure Panic Due to Nil Pointer Dereference in github.com/free5gc/udm","modified":"2026-03-23T18:45:15.216215Z","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."]}