What is CVE-2026-30079?

CVE-2026-30079 is a critical-severity vulnerability in Openairinterface Oai-Cn5g-Amf, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 9.8/10. Published 2026-04-07.

How severe is CVE-2026-30079?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Openairinterface Oai-Cn5g-Amf

CVE-2026-30079

In OpenAirInterface V2.2.0 AMF, Out of sequence messages causes incorrect state transition during UE registration procedure. This allows authentication to be bypassed completely. If a SecurityModeComplete message is sent after InitialUERegistration, a registration reject is received followed by a registration accept! This leads the UE to be registered without proper authentication.

Published 2026-04-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.007 (49.5th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.007 · change: +0.001

Affected products

Openairinterface Oai-Cn5g-Amf — versions 2.2.0

Weakness classification (CWE)

CWE-288 — Authentication Bypass Using an Alternate Path or Channel

References

gitlab.eurecom.fr/oai/cn5g/oai-cn5g-amf/-/issues/77 (Exploit, Third Party Advisory, Issue Tracking)

Frequently asked questions

What is CVE-2026-30079?: CVE-2026-30079 is a critical-severity vulnerability in Openairinterface Oai-Cn5g-Amf, classified under Authentication Bypass Using an Alternate Path or Channel. CVSS score: 9.8/10. Published 2026-04-07.
How severe is CVE-2026-30079?: Critical severity. CVSS v3 base score is 9.8 out of 10.