{"id":"CVE-2026-44473","aliases":["GHSA-qfxw-v8qx-vj3v","GO-2026-5581"],"url":"https://o3.security/vulnerability/CVE-2026-44473","summary":"Ella Core: UE Downlink Redirection via Forged PDUSessionResourceSetupResponse","details":"## Summary\n\nA radio with a valid NG Setup can send a forged PDUSessionResourceSetupResponse carrying any UE's AMF-UE-NGAP-ID. Ella Core does not verify the message arrived on the SCTP association bound to that UE's logical NG-connection, then creates a GTP tunnel towards that radio.\n\n## Impact\n\nDownlink user-plane traffic for the targeted UE is redirected to the attacker's radio.\n\n## Fix\n\nUE context lookups are now scoped to the sending radio's SCTP association.","published":"2026-05-27T15:16:05.261Z","modified":"2026-08-12T03:51:12.729815399Z","cvss":{"score":7.1,"severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"},"epss":{"score":0.00166,"percentile":0.05982,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Go","name":"github.com/ellanetworks/core","fixedVersion":"1.10.0"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/44xxx/CVE-2026-44473.json"},{"type":"ADVISORY","url":"https://github.com/ellanetworks/core/security/advisories/GHSA-qfxw-v8qx-vj3v"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-44473"},{"type":"PACKAGE","url":"https://github.com/ellanetworks/core"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:12.729815399Z"}}