CVE-2026-33062— free5GC NRF Discovery EncodeGroupId Function Panics on Malformed group-id-list Parameter
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I. Basic Information for CVE-2026-33062
Vulnerability Information
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Vulnerability Title
free5GC NRF Discovery EncodeGroupId Function Panics on Malformed group-id-list Parameter
Source: NVD (National Vulnerability Database)
Vulnerability Description
free5GC is an open source 5G core network. free5GC NRF prior to version 1.4.2 has an Improper Input Validation vulnerability leading to Denial of Service. All deployments of free5GC using the NRF discovery service are affected. The `EncodeGroupId` function attempts to access array indices [0], [1], [2] without validating the length of the split data. When the parameter contains insufficient separator characters, the code panics with "index out of range". A remote attacker can cause the NRF service to panic and crash by sending a crafted HTTP GET request with a malformed `group-id-list` parameter. This results in complete denial of service for the NRF discovery service. free5GC NRF version 1.4.2 fixes the issue. There is no direct workaround at the application level. The recommendation is to apply the provided patch or restrict access to the NRF API to trusted sources only.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
访问控制不恰当
Source: NVD (National Vulnerability Database)
Vulnerability Title
nrf 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
nrf是free5GC开源的一个网络存储库功能模块。 nrf 1.4.2之前版本存在访问控制错误漏洞，该漏洞源于EncodeGroupId函数输入验证不当，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
II. Public POCs for CVE-2026-33062
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Patch · 3Advisory · 1
Same Patch Batch · free5gc · 2026-03-20 · 7 CVEs total
| CVE-2026-32937 | free5GC CHF has Out-of-Bounds Slice Access that Leads to DoS | |
| CVE-2026-33063 | free5GC AUSF UE Authentication Panic on Nil SuciSupiMap Interface Conversion | |
| CVE-2026-33064 | free5GC UDM DataChangeNotification Procedure Panic Due to Nil Pointer Dereference | |
| CVE-2026-33065 | free5GC UDM incorrectly returns 500 for empty supi path parameter in DELETE sdm-subscripti | |
| CVE-2026-33191 | free5GC UDM vulnerable to null byte injection in URL path parameters causing 500 Internal | |
| CVE-2026-33192 | free5GC UDM incorrectly returns 500 for empty supi path parameter in PATCH sdm-subscriptio |
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