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National Vulnerability Database

National Vulnerability Database

NVD

National Vulnerability Database
  1. Vulnerabilities

CVE-2026-27643 Detail

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.


Metrics

 
NVD enrichment efforts reference publicly available information to associate vector strings. CVSS information contributed by other sources is also displayed.
CVSS 4.0 Severity and Vector Strings:

NIST CVSS score
NIST: NVD
N/A
NVD assessment not yet provided.

Nist CVSS score does not match with CNA score
CNA:  GitHub, Inc.
CVSS-BT 6.6 MEDIUM
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

References to Advisories, Solutions, and Tools

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URL Source(s) Tag(s)
https://github.com/free5gc/free5gc/issues/753 GitHub, Inc.
https://github.com/free5gc/free5gc/security/advisories/GHSA-6468-f87j-6g82 GitHub, Inc.
https://github.com/free5gc/udr/commit/754d23b03755ad59077ed529ce3b971e477080c4 GitHub, Inc.
https://github.com/free5gc/udr/pull/56 GitHub, Inc.

Weakness Enumeration

CWE-ID CWE Name Source
CWE-209 Generation of Error Message Containing Sensitive Information GitHub, Inc.  

Change History

1 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2026-27643
NVD Published Date:
02/23/2026
NVD Last Modified:
02/24/2026
Source:
GitHub, Inc.