Reference page — cumulative record through Wednesday, August 19, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
free5GC: NEF nnef-pfdmanagement API is unauthenticated; forged bearer tokens can read PFD data and create/delete PFD subscriptions
AV AC PR UI S C I A CVSS EPSS %ile KEV
N L N N C L H H 10.0 .0029 21.3 —
AFFECTED
Product Versions Fixed
free5gc < 4.2.2 – —
TIMELINE
May 5 Reserved by GitHub_M
May 27 EXPLOIT PUBLISHED — CVE-2026-44330 (free5gc). Public exploit reference added.
May 27 Published (CNA: GitHub_M)
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.
Lifecycle
Complete event history — 3 events, chronological
| Date | Event | Detail |
|---|
| May 5, 2026 | Reserved | Reserved by GitHub_M |
| May 27, 2026 | EXPLOIT PUBLISHED | EXPLOIT PUBLISHED — CVE-2026-44330 (free5gc). Public exploit reference added. |
| May 27, 2026 | Published | Published (CNA: GitHub_M) |
Affected
Affected products and packages — 1 row
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|
| free5gc | free5gc | — | < 4.2.2 | — |
About this page
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-44330 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Wednesday, August 19, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.