Vulnerability 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.
Related Weaknesses (CWE)
References
- https://github.com/free5gc/free5gc/security/advisories/GHSA-6gxq-gpr8-xgjp
- https://github.com/free5gc/free5gc/security/advisories/GHSA-6gxq-gpr8-xgjp
FAQ
What is CVE-2026-47780?
CVE-2026-47780 is a documented vulnerability. 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 vali...
How severe is CVE-2026-47780?
CVSS scoring is not yet available for CVE-2026-47780. Check NVD for updates.
Is there a patch for CVE-2026-47780?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.