EUVD Vulnerability Catalog

EUVD-2026-67835

Severity: CRITICAL Base Score: 9.3 CVSS Version: 4.0

Vulnerability Description

free5GC is an open-source implementation of the 5G core network. In 4.2.2 and earlier, the NRF RegisterNFInstance handler at PUT /nnrf-nfm/v1/nf-instances/{nfInstanceID} accepts NF Profiles without enforcing UUID format, nfStatus enum values, heartBeatTimer ranges, mandatory profile fields, or nfServices.ipEndPoints address constraints. The invalid profiles are persisted in the MongoDB NfProfile collection and returned by NFDiscover, allowing an attacker with SBI access to advertise attacker-controlled network-function endpoints and redirect control-plane signaling. This can expose credentials and signaling, alter service discovery integrity, and deny service across network functions that trust the NRF. This issue is fixed in version 4.2.3.

CVSS Vector Analysis

Below is the complete, human-readable breakdown of the CVSS metric string: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

▪ Attack Vector (AV): Network
▪ Attack Complexity (AC): Low
▪ Attack Requirements (AT): None
▪ Privileges Required (PR): None
▪ User Interaction (UI): None
▪ Vulnerability Confidentiality Impact (VC): High
▪ Vulnerability Integrity Impact (VI): High
▪ Vulnerability Availability Impact (VA): High
▪ Subsequent Confidentiality Impact (SC): None
▪ Subsequent Integrity Impact (SI): None
▪ Subsequent Availability Impact (SA): None

Affected Vendors & Systems

Vendor Free5Gc

References & Advisory Links

Metadata Profile

Database Authority

European Union Agency for Cybersecurity (ENISA) EUVD

Assigner

GitHub_M

EPSS Probability

0.44

Known Aliases
GHSA-x8mj-6p3q-g5pp CVE-2026-55068
Published On

2026-08-28

Last Updated

2026-08-31