Vulnerability · Published Feb 24, 2026 · Assigned by GitHub_M

CVE-2025-69253free5GC vulnerable to improper error handling in NEF with information exposure

Medium 6.6

In plain English

A medium-severity security flaw in udr from free5gc. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities).

Severity (CVSS 4.0)6.6Medium

Exploit odds (30 days)0.4%top 65.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

free5GC is an open-source project for 5th generation (5G) mobile core networks. Versions up to and including 1.4.1 of the User Data Repository are affected by Improper Error Handling with Information Exposure. 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 vulnerable. free5gc/udr pull request 56 contains a patch. No direct workaround is available at the application level. Applying the official patch is recommended.

Affected products (as reported)

Vendor	Product	Versions
free5gc	udr	<= 1.4.1

Weakness: CWE-209 · 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

https://github.com/free5gc/free5gc/security/advisories/GHSA-cj2h-x8qm-xgwc x_refsource_CONFIRM
https://github.com/free5gc/free5gc/issues/753 x_refsource_MISC
https://github.com/free5gc/udr/pull/56 x_refsource_MISC
https://github.com/free5gc/udr/commit/754d23b03755ad59077ed529ce3b971e477080c4 x_refsource_MISC