CVE-2026-42083

{"id": "CVE-2026-42083", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-42083", "role": "CISA Coordinator", "options": [{"exploitation": "poc"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "version": "2.0.3", "timestamp": "2026-05-27T17:47:02.758686Z"}}], "cvssMetricV31": [{"type": "Secondary", "source": "security-advisories@github.com", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 8.2, "attackVector": "NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N", "integrityImpact": "LOW", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "NONE", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 4.2, "exploitabilityScore": 3.9}]}, "affected": [{"source": "security-advisories@github.com", "affectedData": [{"vendor": "free5gc", "product": "free5gc", "versions": [{"status": "affected", "version": "< 4.2.2"}]}]}], "published": "2026-05-27T17:16:35.327", "references": [{"url": "https://github.com/free5gc/free5gc/issues/844", "tags": ["Exploit", "Issue Tracking"], "source": "security-advisories@github.com"}, {"url": "https://github.com/free5gc/free5gc/security/advisories/GHSA-6rgm-gr97-x3j5", "tags": ["Issue Tracking", "Vendor Advisory"], "source": "security-advisories@github.com"}, {"url": "https://github.com/free5gc/pcf/commit/8c4d457cdf58bb239ee30e88c56b370b22073964", "tags": ["Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/free5gc/pcf/pull/63", "tags": ["Issue Tracking", "Patch"], "source": "security-advisories@github.com"}, {"url": "https://github.com/free5gc/free5gc/issues/844", "tags": ["Exploit", "Issue Tracking"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}, {"url": "https://github.com/free5gc/free5gc/security/advisories/GHSA-6rgm-gr97-x3j5", "tags": ["Issue Tracking", "Vendor Advisory"], "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "security-advisories@github.com", "description": [{"lang": "en", "value": "CWE-862"}]}], "descriptions": [{"lang": "en", "value": "free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, PCF Npcf_SMPolicyControl missing authentication middleware allows unauthenticated access to SM policy handlers and disclosure of subscriber SUPI. In NewServer(), the smPolicyGroup route group is created and routes are applied without attaching the router authorization middleware. In contrast, other PCF service groups such as Npcf_PolicyAuthorization do attach RouterAuthorizationCheck before route registration. Because the middleware is missing, requests to the /npcf-smpolicycontrol/v1/sm-policies, /npcf-smpolicycontrol/v1/sm-policies/{smPolicyId}, /npcf-smpolicycontrol/v1/sm-policies/{smPolicyId}/update, and /npcf-smpolicycontrol/v1/sm-policies/{smPolicyId}/delete endpoints can reach business logic even when no valid OAuth token is provided. This vulnerability is fixed in 4.2.2."}, {"lang": "es", "value": "free5GC es una implementaci\u00f3n de c\u00f3digo abierto de la red central 5G. Antes de la versi\u00f3n 4.2.2, la falta de middleware de autenticaci\u00f3n en PCF Npcf_SMPolicyControl permite el acceso no autenticado a los manejadores de pol\u00edticas SM y la divulgaci\u00f3n del SUPI del suscriptor. En NewServer(), el grupo de rutas smPolicyGroup se crea y las rutas se aplican sin adjuntar el middleware de autorizaci\u00f3n del router. En contraste, otros grupos de servicios PCF como Npcf_PolicyAuthorization s\u00ed adjuntan RouterAuthorizationCheck antes del registro de rutas. Debido a que el middleware falta, las solicitudes a los endpoints /npcf-smpolicycontrol/v1/sm-policies, /npcf-smpolicycontrol/v1/sm-policies/{smPolicyId}, /npcf-smpolicycontrol/v1/sm-policies/{smPolicyId}/update y /npcf-smpolicycontrol/v1/sm-policies/{smPolicyId}/delete pueden alcanzar la l\u00f3gica de negocio incluso cuando no se proporciona un token OAuth v\u00e1lido. Esta vulnerabilidad est\u00e1 corregida en la versi\u00f3n 4.2.2."}], "lastModified": "2026-10-14T20:10:00.190", "configurations": [{"nodes": [{"negate": false, "cpeMatch": [{"criteria": "cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*", "vulnerable": true, "matchCriteriaId": "EF7EBB95-EB4E-44C5-BF0A-9C99B0A7775F", "versionEndExcluding": "4.2.2"}], "operator": "OR"}]}], "sourceIdentifier": "security-advisories@github.com"}