CVE-2026-27643 affects free5GC UDR versions up to and including 1.4.1, where the NEF component inadvertently leaks internal parsing error details to remote clients, aiding in service fingerprinting. This vulnerability has a CVSS score of 5.3 (Medium), indicating a low-complexity network attack that could lead to information disclosure (CWE-209). There is no evidence of active exploitation, public exploit code, or significant community discussion, and it is not listed in the KEV catalog. A patch is available in free5gc/udr pull request 56, and applying it is the recommended remediation.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 1.4.1CPE matchmatch criteria | cpe:2.3:a:free5gc:udr:*:*:*:*:*:go:*:* |
CVSS version used by this source: 4.0
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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
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The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.