PatchTheCVECVE-2026-44330: free5GC is an open-source implementation of the 5G core network
CVE-2026-44330 is a critical-severity flaw (CVSS 10.0) affecting free5gc. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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-notifica
Why this priority
- Critical severity
- Public exploit reference
- Remotely exploitable, no login, no user action
A fixed release or distro patch exists.
Risk facts
| CVSS score | 10.0 (Critical) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | None |
| EPSS exploit chance | 0.3% (top 79%) |
| CISA exploited list | No |
| Weakness | CWE-863 |
| Published | 2026-05-27 |
| Last modified | 2026-10-14 |
Last updated 2026-10-14 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-44330?
free5gc: upgrade to 4.2.2. Exact commands for each OS are on this page.
Is CVE-2026-44330 being exploited?
CVE-2026-44330 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-44330 affect?
CVE-2026-44330 affects free5gc. Severity is critical (CVSS 10.0). 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
How urgent is CVE-2026-44330?
Priority 50/100. Critical severity; Public exploit reference; Remotely exploitable, no login, no user action
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