Vulnerability Description
free5GC is an open-source implementation of the 5G core network. In 4.2.2 and earlier, the NRF RegisterNFInstance handler at PUT /nnrf-nfm/v1/nf-instances/{nfInstanceID} accepts NF Profiles without enforcing UUID format, nfStatus enum values, heartBeatTimer ranges, mandatory profile fields, or nfServices.ipEndPoints address constraints. The invalid profiles are persisted in the MongoDB NfProfile collection and returned by NFDiscover, allowing an attacker with SBI access to advertise attacker-controlled network-function endpoints and redirect control-plane signaling. This can expose credentials and signaling, alter service discovery integrity, and deny service across network functions that trust the NRF. This issue is fixed in version 4.2.3.
Related Weaknesses (CWE)
References
- https://github.com/free5gc/free5gc/issues/1056
- https://github.com/free5gc/free5gc/releases/tag/v4.2.3
- https://github.com/free5gc/free5gc/security/advisories/GHSA-x8mj-6p3q-g5pp
- https://github.com/free5gc/nrf/commit/bda0cf75be5556bb4c758c8b34710f3fe6bbe3ea
- https://github.com/free5gc/nrf/commit/fcd3cfaa27cc4dc17172ee0c4c3e0a3a696297c6
- https://github.com/free5gc/nrf/pull/90
- https://github.com/free5gc/nrf/releases/tag/v1.4.5
- https://github.com/free5gc/free5gc/security/advisories/GHSA-x8mj-6p3q-g5pp
FAQ
What is CVE-2026-55068?
CVE-2026-55068 is a documented vulnerability. free5GC is an open-source implementation of the 5G core network. In 4.2.2 and earlier, the NRF RegisterNFInstance handler at PUT /nnrf-nfm/v1/nf-instances/{nfInstanceID} accepts NF Profiles without en...
How severe is CVE-2026-55068?
CVSS scoring is not yet available for CVE-2026-55068. Check NVD for updates.
Is there a patch for CVE-2026-55068?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.