{"id":"CVE-2026-44329","sourceIdentifier":"security-advisories@github.com","published":"2026-05-27T17:16:38.490","lastModified":"2026-10-14T20:10:00.190","vulnStatus":"Analyzed","cveTags":[],"descriptions":[{"lang":"en","value":"free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's SMF mounts the UPI management route group without OAuth2/bearer-token authorization middleware. A network attacker who can reach SMF on the SBI can hit UPI endpoints with no Authorization header at all, and the requests reach the SMF business handlers. In the running Docker lab this was directly demonstrated for read (GET /upi/v1/upNodesLinks), write (POST /upi/v1/upNodesLinks with attacker-controlled UP-node and link payload), and delete (DELETE /upi/v1/upNodesLinks/{nodeID}) operations. This vulnerability is fixed in 4.2.2."},{"lang":"es","value":"free5GC es una implementación de código abierto de la red central 5G. Previo a la 4.2.2, el SMF de free5GC monta el grupo de rutas de gestión de UPI sin middleware de autorización OAuth2/bearer-token. Un atacante de red que puede alcanzar el SMF en la SBI puede acceder a los puntos finales de UPI sin ningún encabezado de autorización, y las solicitudes llegan a los manejadores de negocio del SMF. En el laboratorio Docker en ejecución, esto se demostró directamente para operaciones de lectura (GET /upi/v1/upNodesLinks), escritura (POST /upi/v1/upNodesLinks con un nodo UP y una carga útil de enlace controlados por el atacante) y eliminación (DELETE /upi/v1/upNodesLinks/{nodeID}). Esta vulnerabilidad está corregida en la 4.2.2."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"free5gc","product":"free5gc","versions":[{"version":"< 4.2.2","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H","baseScore":10.0,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":6.0}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-05-28T15:00:45.954142Z","id":"CVE-2026-44329","options":[{"exploitation":"poc"},{"automatable":"yes"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-306"},{"lang":"en","value":"CWE-862"}]}],"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*","versionEndExcluding":"4.2.2","matchCriteriaId":"EF7EBB95-EB4E-44C5-BF0A-9C99B0A7775F"}]}]}],"references":[{"url":"https://github.com/free5gc/free5gc/issues/887","source":"security-advisories@github.com","tags":["Exploit","Issue Tracking"]},{"url":"https://github.com/free5gc/free5gc/security/advisories/GHSA-3258-qmv8-frp3","source":"security-advisories@github.com","tags":["Exploit","Vendor Advisory"]},{"url":"https://github.com/free5gc/smf/commit/e23ce97565f285eb99eed153743c62bf4c767c6e","source":"security-advisories@github.com","tags":["Patch"]},{"url":"https://github.com/free5gc/smf/pull/197","source":"security-advisories@github.com","tags":["Issue Tracking","Patch"]},{"url":"https://github.com/free5gc/free5gc/issues/887","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["Exploit","Issue Tracking"]},{"url":"https://github.com/free5gc/free5gc/security/advisories/GHSA-3258-qmv8-frp3","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","tags":["Exploit","Vendor Advisory"]}]}