{"id":"EUVD-2026-32577","enisaUuid":"ce170bdb-0aa0-342c-b226-00e6aec80a3f","description":"free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC\u0027s SMF mounts the UPI management route group without inbound OAuth2 middleware. The POST /upi/v1/upNodesLinks create-or-update handler accepts attacker-controlled JSON and passes it directly into UpNodesFromConfiguration(), which calls logger.InitLog.Fatalf(...) on several validation failures. One confirmed path is the UE-IP-pool overlap check: a single unauthenticated POST that adds a new UPF whose pool overlaps an existing UPF terminates the entire SMF process (docker ps shows Exited (1)), not just the goroutine. This vulnerability is fixed in 4.2.2.","datePublished":"May 27, 2026, 3:47:33 PM","dateUpdated":"May 27, 2026, 5:53:42 PM","baseScore":7.5,"baseScoreVersion":"3.1","baseScoreVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","references":"https://github.com/free5gc/free5gc/security/advisories/GHSA-44qj-cghf-9p97\nhttps://github.com/free5gc/free5gc/issues/906\nhttps://github.com/free5gc/smf/pull/203\nhttps://github.com/free5gc/smf/commit/e0974e07ddab44a67d36a563cca383b2449e33e5\n","aliases":"CVE-2026-44321\nGHSA-44qj-cghf-9p97\n","assigner":"GitHub_M","epss":0.36,"enisaIdProduct":[{"id":"c4f9d0d9-6f11-3fa0-b62f-a372f44d99f7","product":{"name":"Free5GC","vendor":{"name":"Free5Gc"}},"product_version":"\u003c 4.2.2"}],"enisaIdVendor":[{"id":"72292f00-dcdb-31df-90fe-53fced29ec3f","vendor":{"name":"Free5Gc"}}],"enisaIdVulnerability":[{"id":"18d3b433-7a20-3b5f-8f48-e480a794a2ab","vulnerability":{"id":"CVE-2026-44321","description":"free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC\u0027s SMF mounts the UPI management route group without inbound OAuth2 middleware. The POST /upi/v1/upNodesLinks create-or-update handler accepts attacker-controlled JSON and passes it directly into UpNodesFromConfiguration(), which calls logger.InitLog.Fatalf(...) on several validation failures. One confirmed path is the UE-IP-pool overlap check: a single unauthenticated POST that adds a new UPF whose pool overlaps an existing UPF terminates the entire SMF process (docker ps shows Exited (1)), not just the goroutine. This vulnerability is fixed in 4.2.2.","datePublished":"May 27, 2026, 3:47:33 PM","dateUpdated":"May 27, 2026, 5:53:42 PM","status":"PUBLISHED","baseScore":7.5,"baseScoreVersion":"3.1","baseScoreVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","references":"https://github.com/free5gc/free5gc/security/advisories/GHSA-44qj-cghf-9p97\nhttps://github.com/free5gc/free5gc/issues/906\nhttps://github.com/free5gc/smf/pull/203\nhttps://github.com/free5gc/smf/commit/e0974e07ddab44a67d36a563cca383b2449e33e5\n","enisa_id":"EUVD-2026-32577\n","assigner":"GitHub_M","epss":0.36,"dataProcessed":"Nov 9, 2026, 7:17:22 AM","vulnerabilityProduct":[{"id":"19189085-a9bc-36c3-8eff-3460c7f5dfbe","product":{"name":"Free5GC","vendor":{"name":"Free5Gc"}},"product_version":"\u003c 4.2.2"}],"vulnerabilityVendor":[{"id":"fdb6c028-b8b7-343b-bd9d-27938722eadb","vendor":{"name":"Free5Gc"}}]}},{"id":"4705f1e0-f426-32c4-bd77-46bafa218723","vulnerability":{"id":"GHSA-44qj-cghf-9p97","description":"free5GC\u0027s SMF UPI POST /upi/v1/upNodesLinks exits the SMF process on overlapping UE pools (unauthenticated, reachable Fatalf)","datePublished":"May 8, 2026, 10:47:24 PM","dateUpdated":"Jun 8, 2026, 11:47:19 PM","baseScore":0.0,"references":"https://github.com/free5gc/free5gc/security/advisories/GHSA-44qj-cghf-9p97\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-44321\nhttps://github.com/free5gc/free5gc/issues/906\nhttps://github.com/free5gc/smf/pull/203\nhttps://github.com/free5gc/smf/commit/e0974e07ddab44a67d36a563cca383b2449e33e5\nhttps://github.com/free5gc/free5gc\n","enisa_id":"EUVD-2026-32577\n","aliases":"GHSA-44qj-cghf-9p97\nCVE-2026-44321\n","epss":0.0,"dataProcessed":"Nov 8, 2026, 1:57:54 AM","vulnerabilityProduct":[],"vulnerabilityVendor":[]}}],"enisaIdAdvisory":[]}