Vulnerability Description
free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF mounts the nnef-pfdmanagement route group without inbound OAuth2/bearer-token authorization. A network attacker who can reach NEF on the SBI can use a forged or arbitrary bearer token (e.g. Authorization: Bearer not-a-real-token) to read PFD application data via GET /applications and GET /applications/{appID}, and to create or delete PFD change-notification subscriptions via POST /subscriptions and DELETE /subscriptions/{subID}. Same root cause as the other NEF SBI findings: the route group is mounted without any inbound auth middleware. Unlike the OAM and traffic-influence groups, nnef-pfdmanagement IS declared in the runtime ServiceList, so this is the production-intended path that operators expect to be protected by OAuth2 setting receive from NRF: true -- and it is not. This vulnerability is fixed in 4.2.2.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Free5Gc | Free5Gc | < 4.2.2 |
Related Weaknesses (CWE)
References
- https://github.com/free5gc/free5gc/security/advisories/GHSA-rwww-x45w-p52wExploitVendor Advisory
- https://github.com/free5gc/free5gc/security/advisories/GHSA-rwww-x45w-p52wExploitVendor Advisory
FAQ
What is CVE-2026-44330?
CVE-2026-44330 is a vulnerability with a CVSS score of 10.0 (CRITICAL). free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF mounts the nnef-pfdmanagement route group without inbound OAuth2/bearer-token authorization. A network at...
How severe is CVE-2026-44330?
CVE-2026-44330 has been rated CRITICAL with a CVSS base score of 10.0/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-44330?
Check the references section above for vendor advisories and patch information. Affected products include: Free5Gc Free5Gc.