{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-33065", "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "state": "PUBLISHED", "assignerShortName": "GitHub_M", "dateReserved": "2026-03-17T19:27:06.343Z", "datePublished": "2026-03-20T08:03:39.357Z", "dateUpdated": "2026-03-20T08:03:39.357Z"}, "containers": {"cna": {"title": "free5GC UDM incorrectly returns 500 for empty supi path parameter in DELETE sdm-subscriptions request", "problemTypes": [{"descriptions": [{"cweId": "CWE-209", "lang": "en", "description": "CWE-209: Generation of Error Message Containing Sensitive Information", "type": "CWE"}]}], "metrics": [{"cvssV4_0": {"attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "NONE", "userInteraction": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE", "baseScore": 6.9, "baseSeverity": "MEDIUM", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N", "version": "4.0"}}], "references": [{"name": "https://github.com/free5gc/free5gc/security/advisories/GHSA-958m-gxmc-mccm", "tags": ["x_refsource_CONFIRM"], "url": "https://github.com/free5gc/free5gc/security/advisories/GHSA-958m-gxmc-mccm"}, {"name": "https://github.com/free5gc/free5gc/issues/783", "tags": ["x_refsource_MISC"], "url": "https://github.com/free5gc/free5gc/issues/783"}, {"name": "https://github.com/free5gc/udm/pull/79", "tags": ["x_refsource_MISC"], "url": "https://github.com/free5gc/udm/pull/79"}, {"name": "https://github.com/free5gc/udm/commit/88de9fa74a1b3f3522e53b4cfa2d184712ffa4ee", "tags": ["x_refsource_MISC"], "url": "https://github.com/free5gc/udm/commit/88de9fa74a1b3f3522e53b4cfa2d184712ffa4ee"}], "affected": [{"vendor": "free5gc", "product": "free5gc", "versions": [{"version": "< 1.4.2", "status": "affected"}]}], "providerMetadata": {"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa", "shortName": "GitHub_M", "dateUpdated": "2026-03-20T08:03:39.357Z"}, "descriptions": [{"lang": "en", "value": "Free5GC is an open-source Linux Foundation project for 5th generation (5G) mobile core networks. In versions prior to 1.4.2, the UDM incorrectly converts a downstream 400 Bad Request (from UDR) into a 500 Internal Server Error when handling DELETE requests with an empty supi path parameter. This leaks internal error handling behavior and makes it difficult for clients to distinguish between client-side errors and server-side failures. When a client sends a DELETE request with an empty supi (e.g., double slashes // in URL path), the UDM forwards the malformed request to UDR, which correctly returns 400. However, UDM propagates this as 500 SYSTEM_FAILURE instead of returning the appropriate 400 error to the client. This violates REST API best practices for DELETE operations. The issue has been patched in version 1.4.2."}], "source": {"advisory": "GHSA-958m-gxmc-mccm", "discovery": "UNKNOWN"}}}}

{}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "Free5GC is an open-source Linux Foundation project for 5th generation (5G) mobile core networks. In versions prior to 1.4.2, the UDM incorrectly converts a downstream 400 Bad Request (from UDR) into a 500 Internal Server Error when handling DELETE requests with an empty supi path parameter. This leaks internal error handling behavior and makes it difficult for clients to distinguish between client-side errors and server-side failures. When a client sends a DELETE request with an empty supi (e.g., double slashes // in URL path), the UDM forwards the malformed request to UDR, which correctly returns 400. However, UDM propagates this as 500 SYSTEM_FAILURE instead of returning the appropriate 400 error to the client. This violates REST API best practices for DELETE operations. The issue has been patched in version 1.4.2."}], "id": "CVE-2026-33065", "lastModified": "2026-03-20T08:16:12.430", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.9, "baseSeverity": "MEDIUM", "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:L/VI:N/VA:N/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": "NONE", "vulnConfidentialityImpact": "LOW", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "security-advisories@github.com", "type": "Secondary"}]}, "published": "2026-03-20T08:16:12.430", "references": [{"source": "security-advisories@github.com", "url": "https://github.com/free5gc/free5gc/issues/783"}, {"source": "security-advisories@github.com", "url": "https://github.com/free5gc/free5gc/security/advisories/GHSA-958m-gxmc-mccm"}, {"source": "security-advisories@github.com", "url": "https://github.com/free5gc/udm/commit/88de9fa74a1b3f3522e53b4cfa2d184712ffa4ee"}, {"source": "security-advisories@github.com", "url": "https://github.com/free5gc/udm/pull/79"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-209"}], "source": "security-advisories@github.com", "type": "Primary"}]}

{}

{"analysis": {"en": {"generated_at": "2026-03-20T09:26:42.959370+00:00", "value": {"mitigation_remediation": ["Upgrade free5gc to version 1.4.2 or later, which contains the official fix for this error mapping."], "summary": {"action": "Patch", "impact": "Information Disclosure"}, "threat_synthesis": {"affected_systems": "The vulnerability affects the free5gc project\u2019s UDM component in all versions prior to 1.4.2. The issue was resolved in release 1.4.2, so any instance running a version older than that is considered affected.", "description_and_impact": "free5GC UDM maps a downstream 400 Bad Request from the UDR into an internal 500 SYSTEM_FAILURE when a DELETE request contains an empty suci path parameter, such as a double slash. This misclassification leaks internal error handling behavior, violating REST API best practices and making it difficult for clients to distinguish between client\u2011side errors and server\u2011side failures. The weakness is identified as CWE\u2011209, Information Exposure Through an Error Message. The consequence is a loss of accurate failure context, which can impair error handling, debugging, and automated operations.", "risk_and_exploitability": "The CVSS score of 6.9 indicates a medium severity. The vulnerability can be triggered remotely through the UDM\u2019s HTTP API by constructing a DELETE request with an empty supi path. Although exploitation does not provide direct code execution or privilege escalation, the ability to observe the incorrect 500 response can aid attackers in inventorying a vulnerable system or diagnosing its behavior. EPSS data is not available, and the flaw is not listed in CISA\u2019s KEV catalog. The attack vector is network\u2011based, and the risk is moderate due to ease of triggering and lack of high\u2011impact payload execution."}}}}, "created": "2026-03-20T10:36:48.726436+00:00", "updated": "2026-03-20T10:36:48.726471+00:00", "vendors": []}