{"id":"CVE-2026-41136","state":"PUBLISHED","title":"free5GC AMF missing default case in Content-Type switch in HTTPUEContextTransfer","description":"free5GC AMF provides Access & Mobility Management Function (AMF) for free5GC, an an open-source project for 5th generation (5G) mobile core networks. Prior to version 1.4.3, the `HTTPUEContextTransfer` handler in `internal/sbi/api_communication.go` does not include a `default` case in the `Content-Type` switch statement. When a request arrives with an unsupported `Content-Type`, the deserialization step is silently skipped, `err` remains `nil`, and the processor is invoked with a completely uninitialized `UeContextTransferRequest` object. Version 1.4.3 contains a fix.","publishedAt":"2026-04-21T23:54:36.727Z","updatedAt":"2026-04-22T13:11:10.206Z","severity":{"score":5.5,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P","source":"GitHub_M"},"assigner":"GitHub_M","products":["free5gc amf"],"affected":[{"vendor":"free5gc","product":"amf","versions":[{"version":"< 1.4.3","status":"affected"}]}],"references":["https://github.com/free5gc/free5gc/security/advisories/GHSA-r99v-75p9-xqm5","https://github.com/free5gc/amf/releases/tag/v1.4.3"],"weaknesses":["CWE-440"],"ingestedAt":"2026-10-29T20:11:57.932Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/41xxx/CVE-2026-41136.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-41136","state":"PUBLISHED","datePublished":"2026-04-21T23:54:36.727Z","dateUpdated":"2026-04-22T13:11:10.206Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-04-17T12:59:15.738Z"},"containers":{"cna":{"title":"free5GC AMF missing default case in Content-Type switch in HTTPUEContextTransfer","descriptions":[{"lang":"en","value":"free5GC AMF provides Access & Mobility Management Function (AMF) for free5GC, an an open-source project for 5th generation (5G) mobile core networks. Prior to version 1.4.3, the `HTTPUEContextTransfer` handler in `internal/sbi/api_communication.go` does not include a `default` case in the `Content-Type` switch statement. When a request arrives with an unsupported `Content-Type`, the deserialization step is silently skipped, `err` remains `nil`, and the processor is invoked with a completely uninitialized `UeContextTransferRequest` object. Version 1.4.3 contains a fix."}],"affected":[{"vendor":"free5gc","product":"amf","versions":[{"version":"< 1.4.3","status":"affected"}]}],"references":[{"url":"https://github.com/free5gc/free5gc/security/advisories/GHSA-r99v-75p9-xqm5","name":"https://github.com/free5gc/free5gc/security/advisories/GHSA-r99v-75p9-xqm5","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/free5gc/amf/releases/tag/v1.4.3","name":"https://github.com/free5gc/amf/releases/tag/v1.4.3","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":5.5,"baseSeverity":"MEDIUM","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-440","lang":"en","description":"CWE-440: Expected Behavior Violation","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-04-21T23:54:36.727Z"},"source":{"advisory":"GHSA-r99v-75p9-xqm5","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/free5gc/free5gc/security/advisories/GHSA-r99v-75p9-xqm5","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-22T13:11:04.474863Z","id":"CVE-2026-41136","options":[{"Exploitation":"poc"},{"Automatable":"yes"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-22T13:11:10.206Z"}}]}}}