CVE-2026-33062

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{"affected": [{"affectedData": [{"product": "nrf", "vendor": "free5gc", "versions": [{"status": "affected", "version": "< 1.4.2"}]}], "source": "security-advisories@github.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*", "matchCriteriaId": "F7D53A8E-777B-4DD7-898E-7EE90ED6D37A", "versionEndExcluding": "1.4.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "free5GC is an open source 5G core network. free5GC NRF prior to version 1.4.2 has an Improper Input Validation vulnerability leading to Denial of Service. All deployments of free5GC using the NRF discovery service are affected. The `EncodeGroupId` function attempts to access array indices [0], [1], [2] without validating the length of the split data. When the parameter contains insufficient separator characters, the code panics with \"index out of range\". A remote attacker can cause the NRF service to panic and crash by sending a crafted HTTP GET request with a malformed `group-id-list` parameter. This results in complete denial of service for the NRF discovery service. free5GC NRF version 1.4.2 fixes the issue. There is no direct workaround at the application level. The recommendation is to apply the provided patch or restrict access to the NRF API to trusted sources only."}, {"lang": "es", "value": "free5GC es una red central 5G de c\u00f3digo abierto. free5GC NRF anterior a la versi\u00f3n 1.4.2 tiene una vulnerabilidad de validaci\u00f3n de entrada incorrecta que conduce a denegaci\u00f3n de servicio. Todas las implementaciones de free5GC que utilizan el servicio de descubrimiento NRF est\u00e1n afectadas. La funci\u00f3n 'EncodeGroupId' intenta acceder a los \u00edndices de la matriz [0], [1], [2] sin validar la longitud de los datos divididos. Cuando el par\u00e1metro contiene caracteres separadores insuficientes, el c\u00f3digo entra en p\u00e1nico con 'index out of range'. Un atacante remoto puede hacer que el servicio NRF entre en p\u00e1nico y falle al enviar una solicitud HTTP GET manipulada con un par\u00e1metro 'group-id-list' malformado. Esto resulta en una denegaci\u00f3n de servicio completa para el servicio de descubrimiento NRF. free5GC NRF versi\u00f3n 1.4.2 corrige el problema. No hay una soluci\u00f3n alternativa directa a nivel de aplicaci\u00f3n. La recomendaci\u00f3n es aplicar el parche proporcionado o restringir el acceso a la API NRF solo a fuentes confiables."}], "id": "CVE-2026-33062", "lastModified": "2026-06-17T10:36:53.103", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.7, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-33062", "options": [{"exploitation": "none"}, {"automatable": "yes"}, {"technicalImpact": "partial"}], "role": "CISA Coordinator", "timestamp": "2026-03-21T02:57:07.523470Z", "version": "2.0.3"}}]}, "published": "2026-03-20T03:16:01.097", "references": [{"source": "security-advisories@github.com", "tags": ["Exploit", "Issue Tracking"], "url": "https://github.com/free5gc/free5gc/issues/777"}, {"source": "security-advisories@github.com", "tags": ["Vendor Advisory"], "url": "https://github.com/free5gc/free5gc/security/advisories/GHSA-7c47-xr7q-p6hg"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/free5gc/nrf/commit/dac77d8f8f2e0f041c5634fb3c685dcb9734b872"}, {"source": "security-advisories@github.com", "tags": ["Patch"], "url": "https://github.com/free5gc/nrf/pull/80"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-284"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,1.4.2)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "matching", "scores": [{"score": 100.0, "source": "matching"}]}, "original": {"product": "nrf", "source": "cna", "vendor": "free5gc"}, "product": "nrf", "vendor": "free5gc"}], "analysis": {"en": {"generated_at": "2026-03-27T18:27:14.194184+00:00", "value": {"mitigation_remediation": ["Upgrade or patch free5GC NRF to version 1.4.2 or later", "Restrict NRF API access to trusted networks only", "Monitor NRF service logs for crashes and ensure proper handling of malformed requests"], "summary": {"action": "Patch", "impact": "Denial of Service"}, "threat_synthesis": {"affected_systems": "All free5GC NRF installations using the discovery service are affected. The issue exists in versions prior to free5GC NRF 1.4.2. Upgrade to version 1.4.2 or later resolves the vulnerability.", "description_and_impact": "free5GC NRF contains an improper input validation flaw in the EncodeGroupId function that reads array indices [0], [1], and [2] without verifying the split data length. When the group-id-list HTTP parameter has insufficient separator characters, the function panics with an \"index out of range\" error. The resulting crash brings down the NRF discovery service, causing a complete interruption of service for the 5G core network. The weakness is classified as improper access control leading to denial of service (CWE-284).", "risk_and_exploitability": "The CVSS score of 8.7 signals a high severity, and the EPSS score of less than 1% suggests a low probability of exploitation at current time. The attack vector is remote, requiring only an HTTP GET request to the NRF API with a crafted group-id-list parameter. No local privileges are needed. An attacker can cause the NRF service to crash and deny service to the network operator. The vulnerability is not listed in CISA\u2019s KEV catalog, but its availability and service disruption impact make it significant for operators."}}}}, "created": "2026-03-20T08:52:59.493263+00:00", "updated": "2026-03-27T20:26:49.433360+00:00", "vendors": ["free5gc", "free5gc$PRODUCT$nrf"]}