Description
free5GC UDR is the user data repository (UDR) for free5GC, an an open-source project for 5th generation (5G) mobile core networks. Versions prior to 1.4.1 contain an Improper Error Handling vulnerability with Information Exposure. All deployments of free5GC using the Nnef_PfdManagement service may be affected. The NEF component reliably leaks internal parsing errors (e.g., invalid character 'n' after top-level value) to remote clients. This can aid attackers in fingerprinting server software and logic flows. Version 1.4.1 fixes the issue. There is no direct workaround at the application level. The recommended mitigation is to apply the provided patch.
References (4)
Core 4
Core References
Issue Tracking x_refsource_misc
https://github.com/free5gc/free5gc/issues/753
Vendor Advisory x_refsource_confirm
https://github.com/free5gc/free5gc/security/advisories/GHSA-f3pc-w7jp-4jh2
Issue Tracking x_refsource_misc
https://github.com/free5gc/udr/pull/56
Patch x_refsource_misc
https://github.com/free5gc/udr/commit/91bb34bd96e1c89b3fddca80db8b90049da61ebb
Scores
CVSS v3
5.3
EPSS
0.0027
EPSS Percentile
18.3%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-209
Status
published
Products (1)
free5gc/udr
< 1.4.1
Published
Feb 23, 2026
Tracked Since
Feb 23, 2026