---
id: CVE-2026-30080
title: >-
  OpenAirInterface v2.2.0 accepts Security Mode Complete without any integrity
  protection
summary: >-
  OpenAirInterface v2.2.0 accepts Security Mode Complete without any integrity
  protection. Configuration has supported integrity NIA1 and NIA2. But if an UE
  sends initial registration request with only security capability IA0,
  OpenAirInter…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N'
cwe:
  - CWE-294
vendor: openairinterface
product: oai-cn5g-amf
affected:
  - oai-cn5g-amf = 2.2.0
published: '2026-04-08'
updated: '2026-07-25'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-30080'
references:
  - url: 'https://gitlab.eurecom.fr/oai/cn5g/oai-cn5g-amf/-/issues/78'
    label: cve@mitre.org
  - url: 'https://gitlab.eurecom.fr/oai/cn5g/oai-cn5g-amf/-/issues/78'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
epss: 0.00346
epssPercentile: 0.2542
ingestedAt: '2026-07-26T00:06:15.015Z'
---

## Overview

OpenAirInterface v2.2.0 accepts Security Mode Complete without any integrity protection. Configuration has supported integrity NIA1 and NIA2. But if an UE sends initial registration request with only security capability IA0, OpenAirInterface accepts and proceeds. This downgrade security context can lead to the possibility of replay attack.

## Affected

- `oai-cn5g-amf = 2.2.0`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.