{"id":"GHSA-qfxw-v8qx-vj3v","summary":"Ella Core Vulnerable to 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.","aliases":["CVE-2026-44473","GO-2026-5581"],"modified":"2026-06-25T23:11:52.674457255Z","published":"2026-05-11T15:18:47Z","database_specific":{"github_reviewed_at":"2026-05-11T15:18:47Z","nvd_published_at":"2026-05-27T17:16:39Z","cwe_ids":["CWE-358","CWE-863"],"severity":"HIGH","github_reviewed":true},"references":[{"type":"WEB","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"}],"affected":[{"package":{"name":"github.com/ellanetworks/core","ecosystem":"Go","purl":"pkg:golang/github.com/ellanetworks/core"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.10.0"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/05/GHSA-qfxw-v8qx-vj3v/GHSA-qfxw-v8qx-vj3v.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:H"}]}