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VULNERABILITIES

CVE-2026-40343 Details

Description

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.

Metrics

CVSS 3.x Severity and Vector Strings:

NIST: [email protected]CVSS-B:5.8 MEDIUMVector:CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://github.com/free5gc/free5gc/security/advisories/GHSA-jwch-w7wh-gqjm [email protected]MitigationPatchVendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-754Improper Check for Unusual or Exceptional Conditions[email protected]

Affected Products

ProductVersions
free5gc free5gc
<= 4.2.1

CPE

  • cpe:2.3:a:free5gc:free5gc:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
free5gc udr
<= 1.4.2

CPE

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

Remediation

  • No remediation found in references.

Change History

4 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-40343
NVD Published Date:
Apr 22, 2026
NVD Last Modified:
Jun 17, 2026
Source:
[email protected]
CVE-2026-40343 Details - Not Deferred