{"cve":"CVE-2026-44330","nvd":{"published":"2026-05-27T17:16:38.713","modified":"2026-10-14T20:10:00.190","status":"Analyzed","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H","score":10.0},"cwes":["CWE-863"],"references":["https://github.com/free5gc/free5gc/security/advisories/GHSA-rwww-x45w-p52w","https://github.com/free5gc/free5gc/security/advisories/GHSA-rwww-x45w-p52w"],"products":["free5gc:free5gc"],"source":"nvd","synced_at":"2026-10-19T22:36:28.938604137+00:00"},"epss":{"cve":"CVE-2026-44330","score":0.00287,"percentile":0.2103,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-rwww-x45w-p52w","url":"https://osv.dev/vulnerability/GHSA-rwww-x45w-p52w","summary":"free5GC's NEF nnef-pfdmanagement API is unauthenticated; forged bearer tokens can read PFD data and create/delete PFD subscriptions","modified":"2026-06-25T23:11:30.568271720Z","packages":[{"ecosystem":"Go","name":"github.com/free5gc/nef","purl":"pkg:golang/github.com/free5gc/nef","ranges":["<=1.2.3"],"fixed":[]}]},{"id":"GO-2026-5642","url":"https://osv.dev/vulnerability/GO-2026-5642","summary":"free5GC's NEF nnef-pfdmanagement API is unauthenticated; forged bearer tokens can read PFD data and create/delete PFD subscriptions in github.com/free5gc/nef","modified":"2026-06-25T23:01:36.599640524Z","packages":[{"ecosystem":"Go","name":"github.com/free5gc/nef","purl":"pkg:golang/github.com/free5gc/nef","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."]}