CVE-2026-40343

free5GC UDR is the user data repository (UDR) for free5GC, an an open-source project for 5th generation (5G) mobile core networks. In versions up to and including 1.4.2, a fail-open request handling flaw in the UDR service causes the `/nudr-dr/v2/policy-data/subs-to-notify` POST handler to continue processing requests even after request body retrieval or deserialization errors. This may allow unintended creation of Policy Data notification subscriptions with invalid, empty, or partially processed input, depending on downstream processor behavior. As of time of publication, a patched version is not available.

CVSS v3 5.8 MEDIUM

5.8^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 3.9 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact LOW

Availability Impact NONE

Scope CHANGED

References

Link	Resource
https://github.com/free5gc/free5gc/security/advisories/GHSA-jwch-w7wh-gqjm	Mitigation Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:free5gc:free5gc::::::::
	cpe:2.3:a:free5gc:udr::::::go::*

History

No history.

Information

Published : 2026-04-22 00:16

Updated : 2026-06-17 10:45

NVD link : CVE-2026-40343

Mitre link : CVE-2026-40343

CVE.ORG link : CVE-2026-40343

JSON object : View

Products Affected

free5gc

udr
free5gc

CWE

CWE-754

Improper Check for Unusual or Exceptional Conditions

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