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CVE-2026-8120— Open5GS NSSF nnssf-handler.c 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NSSF中文件/src/nssf/nnssf-handler.c的函数nssf_nnrf_nsselection_handle_get_from_amf_or_vnssf操作导致拒绝服务，可能远程攻击。

CVSS 4.3 · Medium EPSS 0.68% · P50

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-2026-8120

Vulnerability Information
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Vulnerability Title
Open5GS NSSF nnssf-handler.c denial of service
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been found in Open5GS up to 2.7.7. The affected element is the function nssf_nnrf_nsselection_handle_get_from_amf_or_vnssf of the file /src/nssf/nnssf-handler.c of the component NSSF. Executing a manipulation can lead to denial of service. The attack can be executed remotely. The exploit has been published 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NSSF中文件/src/nssf/nnssf-handler.c的函数nssf_nnrf_nsselection_handle_get_from_amf_or_vnssf操作导致拒绝服务，可能远程攻击。
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-2026-8120

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III. Intelligence Information for CVE-2026-8120

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Other References for CVE-2026-8120 (1)

Same Patch Batch · n/a · 2026-05-08 · 40 CVEs total

CVE-2026-8127 6.3 MEDIUM eladmin Users API Endpoint UserController.java checkLevel access control
CVE-2026-8123 4.3 MEDIUM Open5GS NSSF message.c ogs_sbi_discovery_option_add_snssais denial of service
CVE-2026-8122 4.3 MEDIUM Open5GS NSSF message.c ogs_sbi_discovery_option_add_service_names denial of service
CVE-2026-8121 4.3 MEDIUM Open5GS NSSF conv.c ogs_sbi_parse_plmn_list denial of service
CVE-2026-8124 3.3 LOW GPAC box_code_base.c sidx_box_read allocation of resources
CVE-2026-8119 3.3 LOW Open5GS NSSF nghttp2-server.c ogs_sbi_stream_find_by_id denial of service
CVE-2025-67888 Control Web Panel 操作系统命令注入漏洞
CVE-2025-67887 1C-Bitrix 安全漏洞
CVE-2025-67886 Bitrix24 代码问题漏洞
CVE-2025-69690 pfSense 安全漏洞
CVE-2025-69691 pfSense 安全漏洞
CVE-2025-69599 RayVentory Scan Engine 安全漏洞
CVE-2025-55449 AstrBot 安全漏洞
CVE-2023-46453 GL.iNet Router 安全漏洞
CVE-2026-38361 dash-uploader 资源管理错误漏洞
CVE-2026-37431 Beauty Parlour Management System SQL注入漏洞
CVE-2026-38360 dash-uploader 路径遍历漏洞
CVE-2026-29972 nanoMODBUS 安全漏洞
CVE-2026-29975 Lightweight JSON text parser 安全漏洞
CVE-2026-29974 minmea 安全漏洞

Showing top 20 of 40 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

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

V. Comments for CVE-2026-8120

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