CVE-2026-30077

High

Published: 30 March 2026

Published

30 March 2026

Modified

06 April 2026

KEV Added

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Patch

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CVSS Score 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Score 0.0007 22.3th percentile

Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2026-30077 is a high-severity Improper Input Validation (CWE-20) vulnerability in Openairinterface Openairinterface. Its CVSS base score is 7.5 (High).

Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 22.3th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.

The strongest mitigations our analysis identified are NIST 800-53 SI-10 (Information Input Validation) and SI-11 (Error Handling).

Threat & Defense at a Glance

What attackers do: exploitation maps to Exploit Public-Facing Application (T1190) and 1 other technique. What defenders deploy: see the NIST 800-53 controls recommended below.

Threat & Defense Details

Mitigating Controls (NIST 800-53 r5)AI

SI-10 Information Input Validation good match

prevent

SI-10 requires validating inputs such as malformed messages before decoding to prevent crashes in the AMF component.

SI-11 Error Handling good match

prevent

SI-11 ensures proper error handling during decode failures to avoid system crashes triggered by specific malformed inputs.

SI-2 Flaw Remediation good match

prevent

SI-2 mandates timely flaw remediation, such as applying the documented patch for this AMF decoding vulnerability to eliminate the crash condition.

MITRE ATT&CK Enterprise TechniquesAI

T1190 Exploit Public-Facing Application Initial Access

Adversaries may attempt to exploit a weakness in an Internet-facing host or system to initially access a network.

attack.mitre.org →

T1499.004 Application or System Exploitation Impact

Adversaries may exploit software vulnerabilities that can cause an application or system to crash and deny availability to users.

attack.mitre.org →

Why these techniques?

Remote unauthenticated crash via malformed AMF messages directly enables T1190 (exploit public-facing app for DoS) and T1499.004 (endpoint DoS via application exploitation).

Confidence: HIGH · MITRE ATT&CK Enterprise v18.1

NVD Description

OpenAirInterface V2.2.0 AMF crashes when it fails to decode the message. Not all decode failures result in a crash. But the crash is consistent for particular inputs. An example input in hex stream is 80 00 00 0E 00 00…

01 00 0F 80 02 02 40 00 58 00 01 88.

Deeper analysisAI

CVE-2026-30077 is a denial-of-service vulnerability affecting OpenAirInterface version 2.2.0, specifically the AMF (Access and Mobility Management Function) component. The issue stems from improper input validation (CWE-20), where the AMF crashes upon failing to decode certain malformed messages. Not all decode failures trigger a crash, but it occurs consistently for specific inputs, such as the hex stream 80 00 00 0E 00 00 01 00 0F 80 02 02 40 00 58 00 01 88. The vulnerability was published on 2026-03-30 and carries a CVSS v3.1 base score of 7.5 (AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H), indicating high severity due to its impact on availability.

The vulnerability can be exploited remotely over the network by unauthenticated attackers with low complexity and no user interaction required. By sending a specially crafted message to the AMF, an attacker can trigger a crash, causing a denial of service that disrupts the AMF's functionality. This affects the availability of the 5G core network component without impacting confidentiality or integrity.

Mitigation is addressed in the project's GitLab repository, where issue #76 documents the crash details and reproduction steps, and merge request #414 provides the corresponding patch to fix the decoding logic in the AMF. Security practitioners should update to a patched version of OpenAirInterface beyond V2.2.0 or apply the fix from the merge request to prevent exploitation.