free5GC UDR is the user data repository (UDR) for free5GC, an an open-source project for 5th generation (5G) mobile core networks. In versions up to and including 1.4.1, the NEF component reliably leaks internal parsing error details (e.g., invalid character 'n' after top-level value) to remote clients, which can aid attackers in service fingerprinting. All deployments of free5GC using the Nnef_PfdManagement service may be affected. free5gc/udr pull request 56 contains a patch for the issue. There is no direct workaround at the application level. The recommendation is to apply the provided patch.

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History

Thu, 26 Feb 2026 15:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 25 Feb 2026 16:00:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:free5gc:udr:*:*:*:*:*:go:*:*
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N'}


Tue, 24 Feb 2026 10:00:00 +0000

Type Values Removed Values Added
First Time appeared Free5gc
Free5gc udr
Vendors & Products Free5gc
Free5gc udr

Tue, 24 Feb 2026 00:45:00 +0000

Type Values Removed Values Added
Description free5GC UDR is the user data repository (UDR) for free5GC, an an open-source project for 5th generation (5G) mobile core networks. In versions up to and including 1.4.1, the NEF component reliably leaks internal parsing error details (e.g., invalid character 'n' after top-level value) to remote clients, which can aid attackers in service fingerprinting. All deployments of free5GC using the Nnef_PfdManagement service may be affected. free5gc/udr pull request 56 contains a patch for the issue. There is no direct workaround at the application level. The recommendation is to apply the provided patch.
Title free5GC has improper error handling in NEF with information exposure
Weaknesses CWE-209
References
Metrics cvssV4_0

{'score': 6.6, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U'}


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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-02-26T14:36:45.483Z

Reserved: 2026-02-20T22:02:30.029Z

Link: CVE-2026-27643

cve-icon Vulnrichment

Updated: 2026-02-26T14:35:57.336Z

cve-icon NVD

Status : Analyzed

Published: 2026-02-24T01:16:15.543

Modified: 2026-02-25T15:46:38.757

Link: CVE-2026-27643

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-02-24T09:54:22Z

Weaknesses