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CVE-2026-7706— Open5GS AMF gmm-handler.c gmm_handle_service_request denial of service

Quick assessment

Affected
n/a Open5GS
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Open5GS是Open5GS开源的一个 5G Core 和 Epc 的 C 语言开源实现，即 Lte/Nr 网络的核心网络。 Open5GS 2.7.7及之前版本存在安全漏洞，该漏洞源于组件AMF中文件/src/amf/gmm-handler.c的函数gmm_handle_service_request，可能导致拒绝服务。

CVSS 4.3 · Medium EPSS 0.28% · P20

Possible ATT&CK Techniques 1 AI

T1499 · Endpoint Denial of Service

Affected Version Matrix 8

VendorProduct Version RangeStatus
n/a Open5GS 2.7.0 affected
2.7.1 affected
2.7.2 affected
2.7.3 affected
2.7.4 affected
2.7.5 affected
2.7.6 affected
2.7.7 affected
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I. Basic Information for CVE-2026-7706

Vulnerability Information
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Vulnerability Title
Open5GS AMF gmm-handler.c gmm_handle_service_request denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability has been found in Open5GS up to 2.7.7. This issue affects the function gmm_handle_service_request of the file /src/amf/gmm-handler.c of the component AMF. The manipulation leads to denial of service. The attack can be initiated remotely. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不恰当的资源关闭或释放
Source: CVE Program / CVE List V5
Vulnerability Title
Open5GS 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Open5GS是Open5GS开源的一个 5G Core 和 Epc 的 C 语言开源实现，即 Lte/Nr 网络的核心网络。 Open5GS 2.7.7及之前版本存在安全漏洞，该漏洞源于组件AMF中文件/src/amf/gmm-handler.c的函数gmm_handle_service_request，可能导致拒绝服务。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
- Open5GS 2.7.0 cpe:2.3:a:open5gs:open5gs:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-7706

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III. Intelligence Information for CVE-2026-7706

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Patches & Fixes for CVE-2026-7706 (1)

Same Patch Batch · n/a · 2026-05-03 · 6 CVEs total

CVE-2026-7711 7.3 HIGH MindsDB Engine proc_wrapper.py exec unrestricted upload
CVE-2026-7712 6.3 MEDIUM MindsDB Pickle pickle.loads deserialization
CVE-2026-7673 4.7 MEDIUM crmeb_java Admin Upload UploadServiceImpl.java unrestricted upload
CVE-2026-7708 4.3 MEDIUM Open5GS UDR subscription.c ogs_dbi_subscription_data denial of service
CVE-2026-7707 4.3 MEDIUM Open5GS UDR nudr-handler.c udr_nudr_dr_handle_subscription_context denial of service

IV. Related Vulnerabilities

Same product: Open5GS
Same vendor: n/a
Same weakness: CWE-404

V. Comments for CVE-2026-7706

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