{"cve":"CVE-2026-47780","nvd":{"published":"2026-09-15T15:17:15.843","modified":"2026-09-30T17:51:56.193","status":"Deferred","description":"free5GC is an open-source implementation of the 5G core network. In 4.2.3 and earlier, HandleCreateEeSubscriptions and HandleQueryeesubscriptions in free5gc/udr internal/sbi/api_datarepository.go validate the ueId path value with a regular expression whose final .+ alternative accepts every non-empty string instead of restricting identifiers to supported SUPI and GPSI formats. An actor with network reachability to the UDR SBI can submit a non-3GPP identifier to /nudr-dr/v2/subscription-data/{ueId}/context-data/ee-subscriptions, causing the identifier to pass validation and enter the normal create or query flow. The advisory does not independently establish whether authentication is required. Invalid identifiers can be persisted and retrieved as subscription records, enabling unauthorized data creation, UDR namespace pollution, persistent subscriber-metadata corruption, and interference with downstream components that trust stored identifiers to use valid 3GPP formats. The exposure is most relevant in lab, test, or loosely segmented service-based-interface deployments where direct UDR access is possible.","cvss_v4":{"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","score":6.9},"cvss_v3":null,"cwes":["CWE-20"],"references":["https://github.com/free5gc/free5gc/security/advisories/GHSA-6gxq-gpr8-xgjp","https://github.com/free5gc/free5gc/security/advisories/GHSA-6gxq-gpr8-xgjp"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:53:43.293028046+00:00"},"epss":{"cve":"CVE-2026-47780","score":0.00538,"percentile":0.45036,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-6gxq-gpr8-xgjp","url":"https://osv.dev/vulnerability/GHSA-6gxq-gpr8-xgjp","summary":"free5GC UDR has improper `ueId` validation in EE subscription handlers that allows arbitrary identifier persistence","modified":"2026-06-25T18:56:33.011968244Z","packages":[{"ecosystem":"Go","name":"github.com/free5gc/udr","purl":"pkg:golang/github.com/free5gc/udr","ranges":["<=1.4.3"],"fixed":[]}]},{"id":"GO-2026-5178","url":"https://osv.dev/vulnerability/GO-2026-5178","summary":"free5GC UDR has improper `ueId` validation in EE subscription handlers that allows arbitrary identifier persistence in github.com/free5gc/udr","modified":"2026-06-25T18:45:19.480780814Z","packages":[{"ecosystem":"Go","name":"github.com/free5gc/udr","purl":"pkg:golang/github.com/free5gc/udr","ranges":["all versions"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}