EUVD-2026-19642
GHSA-j69j-3gv3-pwvg
Severity by source
AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary rating from NVD · only source for this CVE.
CVSS VectorNVD
Lifecycle Timeline
3DescriptionCVE.org
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.
AnalysisAI
Authentication bypass in OpenAirInterface V2.2.0 Access Management Function (AMF) allows unauthenticated remote attackers to register unauthorized User Equipment (UE) devices on 5G core networks. Exploiting incorrect state machine transitions during UE registration, attackers send SecurityModeComplete messages after InitialUERegistration to trigger registration acceptance without completing proper authentication procedures. This grants full network access to malicious devices, enabling unauthorized subscriber services consumption, interception of traffic, and potential lateral movement within 5G infrastructure. No public exploit identified at time of analysis.
Technical ContextAI
CWE-288 authentication bypass via state machine confusion in AMF registration flow. Out-of-sequence SecurityModeComplete messages exploit logic flaws in state transition validation, causing protocol handler to issue both registration reject and accept responses consecutively. Vulnerable implementations fail to enforce strict ordering of 3GPP TS 23.502 authentication procedures, allowing attackers to skip AKA verification entirely.
RemediationAI
No vendor-released patch identified at time of analysis. Monitor GitLab issue tracker at https://gitlab.eurecom.fr/oai/cn5g/oai-cn5g-amf/-/issues/77 for upstream resolution status and commit availability. Until patched version released, implement strict network-level access controls to restrict AMF exposure to authenticated MME/gNodeB entities only. Deploy protocol-aware firewalls enforcing correct 5G NAS message sequencing. Consider temporarily disabling vulnerable AMF instances in production 5G cores, reverting to validated prior releases if available. Consult vendor advisory at https://nvd.nist.gov/vuln/detail/CVE-2026-30079 for updated guidance. Validate all UE registrations through external AUSF/UDM logs to detect bypass attempts.
LibreNMS before 24.10.0 allows a remote attacker to execute arbitrary code via OS command injection involving AboutContr
Reachable assertion in Open5GS up to version 2.7.6 allows remote unauthenticated attackers to crash the Diameter CER han
A Command Injection issue in the payload build page in BYOB (Build Your Own Botnet) 2.0 allows attackers to execute arbi
Denial of service in Open5GS 2.7.6 and earlier allows network-adjacent attackers with low-privilege Diameter Gx peer acc
Denial of service in Open5GS HSS (Home Subscriber Server) versions 2.7.0 through 2.7.6 is triggered remotely by manipula
Remote command injection in Control Web Panel allows unauthenticated attackers to execute arbitrary OS commands as root
LINQPad before 5.52.01 Pro edition is vulnerable to Unsafe Deserialization in LINQPad.AutoRefManager::PopulateFromCache(
Remote code execution in dash-uploader (Python package for Plotly Dash) versions 0.1.0 through 0.7.0a2 allows unauthenti
Command injection in LiteLLM 1.18.10 lets attackers who can configure MCP (Model Context Protocol) servers supply arbitr
SQL injection in AzuraCast's backup restore flow (versions up to and including 0.23.7) lets an attacker achieve privileg
Arbitrary file read in Yu AI Code Mother v4.3 lets anonymous, remote attackers retrieve files outside the intended previ
Remote code execution in APScheduler (all versions through 3.10.x and 4.0.0a5) is achievable when applications deseriali
Same technique Authentication Bypass
View allShare
External POC / Exploit Code
Leaving vuln.today