🛡️ CVE-2026-44327
🔴 CVSS 10.0 — Critical ⚠️ Exploit Public CWE-306 NVD
10.0
CVSS Score
0 Low4 Medium7 High9 Critical10

Description

free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF mounts the nnef-oam route group without inbound OAuth2/bearer-token authorization. A network attacker who can reach NEF on the SBI can hit the OAM route with no Authorization header at all and the handler returns 200 OK. The current OAM handler is a stub that returns null, but the structural defect is route-group-scoped: the entire OAM route group has no inbound auth middleware, so every future OAM operation added to this group inherits the missing auth boundary by default. This vulnerability is fixed in 4.2.2.

Details

Severity CRITICAL
CVSS Score 10.0
CVSS Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:H
CWE CWE-306
Public Exploit ⚠️ Yes
Source NVD
Published 2026-05-27
Updated 2026-06-09
Modified 2026-05-28

Affected Packages

Software From version Fixed in
free5gc — 4.2.2
github.com/free5gc/nef — —
unknown — —

Similar Threats

Free Vulnerability Check

Is your WordPress site affected?

BotEraser helps you identify potentially vulnerable plugins and themes by checking your installation against known CVE records.

Scan My Site Free →

No credit card required  ·  Results in minutes

ⓘ Data Notice: The information presented above has been compiled from publicly available internet sources. Boteraser aggregates this data solely for informational purposes and does not independently classify, evaluate, or endorse any findings about the vulnerabilities listed. The accuracy and completeness of this information is the sole responsibility of the original publishers. Boteraser and its operators accept no liability for any decisions made based on this data.