CVE WatchOct 26, 2026

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 versio

CVSS

5.8

Medium

EPSS

8.6%

p95

KEV

—

Exploit Today

0-100

Published: Apr 22, 2026 · Last modified: Oct 26, 2026 · CWE-754

EPSS · 30d

0.3%EPSS · 30 days8.6%

2026-10-012026-10-28

Technical 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.

Official references

github.comhttps://github.com/free5gc/free5gc/security/advisories/GHSA-jwch-w7wh-gqjm

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